How about in the CDVR logs, anything there that might help? I just tested with a FireStick client, instead of through the ADBTuner Preview -- and it worked there for me too:
CDVR logs:
2025/12/22 12:48:12.384551 [TNR] Opened connection to M3U-ADBTuner-Paramount+ for ch15026 Paramount+ 1
FruitDeepLinks:
[2025-12-22 19:48:14] [DEBUG] ADB deeplink lookup: provider=pplus, lane=1, event_id=appletv-umc.cse.447ftlcvft4ovobthz1zhcrsw, lookup_id=umc.cse.447ftlcvft4ovobthz1zhcrsw, uid_col=pvid
ADBTuner logs:
2025-12-22 19:48:13.356 - stream - [Tune (m296vsP23aoGAXHoHrULfG)] No active tuners found for Paramount+ 1. Reserving a new tuner.
2025-12-22 19:48:13.356 - tuner_management - [Tune m296vsP23aoGAXHoHrULfG] Attempting to reserve tuner for: ['com.cbs.ott', 'com.cbs.ott'].
2025-12-22 19:48:13.361 - tuner_management - [Tune m296vsP23aoGAXHoHrULfG] Available Tuners:
2025-12-22 19:48:13.361 - tuner_management - [Tune m296vsP23aoGAXHoHrULfG] Name: firestick-rack1 Priority: 1
2025-12-22 19:48:13.361 - tuner_management - [Tune m296vsP23aoGAXHoHrULfG] Name: firestick-rack2 Priority:
2025-12-22 19:48:13.362 - tuner_management - [Tune m296vsP23aoGAXHoHrULfG] Using first available tuner (by priority).
2025-12-22 19:48:13.362 - tuner_management - [Tune m296vsP23aoGAXHoHrULfG] Reserved Tuner: Name: firestick-rack1 Priority: 1
2025-12-22 19:48:13.362 - stream - [Tune (m296vsP23aoGAXHoHrULfG)] Tuning to Paramount+ 1 on firestick-rack1
2025-12-22 19:48:13.362 - stream - [Tune (m296vsP23aoGAXHoHrULfG)] Using channel configuration: FruitDeepLinks - Paramount+ (62a01c95-94f8-41b7-b56b-4838859ab42d)
2025-12-22 19:48:13.362 - stream - [Tune m296vsP23aoGAXHoHrULfG] Redirecting to stream after 0.01 seconds (fixed delay of 0 seconds exceeded). Tuning is still in progress.
2025-12-22 19:48:13.362 - uvicorn.access - 100.111.146.77:0 - "GET /stream/696 HTTP/1.1" 307
2025/12/22 19:48:13 [PROXY] 100.111.146.77 -> GET "/proxy/3?requestKey=m296vsP23aoGAXHoHrULfG" -> "http://encoder_48007/0.ts"
2025-12-22 19:48:13.706 - lib.adb - [Tune (m296vsP23aoGAXHoHrULfG)] ADB: firestick-rack1 - input keyevent KEYCODE_WAKEUP
2025-12-22 19:48:14.122 - server -
--------------------------------------------------
Tuner "firestick-rack1" is currently in use and locked.
Tune ID: N/A
Channel: Paramount+ 1
Lock Obtained: 2025-12-22 19:48:13 (0.02 minutes ago)
Last Seen: N/A
Bytes Transferred: None
Remote User Agent:
N/A
--------------------------------------------------
2025-12-22 19:48:14.831 - lib.adb - [Tune (m296vsP23aoGAXHoHrULfG)] ADB: firestick-rack1 - pidof com.cbs.ott
2025-12-22 19:48:14.972 - stream - [Tune (m296vsP23aoGAXHoHrULfG)] Resolving dynamic URL (http://htpc6:6655/api/adb/lanes/pplus/1/deeplink?format=json) for channel.
2025-12-22 19:48:14.996 - stream - [Tune (m296vsP23aoGAXHoHrULfG)] Retrieved dynamic URL data: {'channel_id': 'pplus01', 'channel_name': 'CBS Sports', 'deeplink': 'pplus://www.paramountplus.com/live-tv/stream/serie-a/e3336669-b4d0-4617-8968-dc8be9914937?searchReferral=appleatv&source=spotlight', 'deeplink_format': 'scheme', 'event_end_utc': '2025-12-22T23:35:00+00:00', 'event_start_utc': '2025-12-22T17:00:00+00:00', 'lane_number': 1, 'provider_code': 'pplus', 'start_utc': '2025-12-22T17:00:00+00:00', 'status': 'success', 'stop_utc': '2025-12-22T23:35:00+00:00', 'title': 'Italy Supercoppa Italiana: SSC Napoli vs. Bologna FC'}
2025-12-22 19:48:14.996 - stream - [Tune (m296vsP23aoGAXHoHrULfG)] Using pplus://www.paramountplus.com/live-tv/stream/serie-a/e3336669-b4d0-4617-8968-dc8be9914937?searchReferral=appleatv&source=spotlight to load channel.
2025-12-22 19:48:14.996 - lib.adb - [Tune (m296vsP23aoGAXHoHrULfG)] ADB: firestick-rack1 - input keyevent KEYCODE_MEDIA_STOP
2025-12-22 19:48:15.906 - lib.adb - [Tune (m296vsP23aoGAXHoHrULfG)] ADB: firestick-rack1 - am force-stop com.cbs.ott
2025-12-22 19:48:16.020 - lib.adb - [Tune (m296vsP23aoGAXHoHrULfG)] ADB: firestick-rack1 - am start -W -a android.intent.action.VIEW -d 'pplus://www.paramountplus.com/live-tv/stream/serie-a/e3336669-b4d0-4617-8968-dc8be9914937?searchReferral=appleatv&source=spotlight' 'com.cbs.ott'
2025-12-22 19:48:17.948 - stream - [Tune m296vsP23aoGAXHoHrULfG] Waiting 3 seconds to allow sleeping device to setup.
2025-12-22 19:48:20.948 - lib.adb - [Tune (m296vsP23aoGAXHoHrULfG)] ADB: firestick-rack1 - sleep 8
2025-12-22 19:48:20.948 - lib.adb - [Tune (m296vsP23aoGAXHoHrULfG)] ADB: Sleeping for 8.0 seconds.
2025-12-22 19:48:28.948 - lib.adb - [Tune (m296vsP23aoGAXHoHrULfG)] ADB: firestick-rack1 - input keyevent KEYCODE_DPAD_CENTER
2025-12-22 19:48:29.927 - lib.adb - [Tune (m296vsP23aoGAXHoHrULfG)] ADB: firestick-rack1 - sleep 8
2025-12-22 19:48:29.927 - lib.adb - [Tune (m296vsP23aoGAXHoHrULfG)] ADB: Sleeping for 8.0 seconds.
2025-12-22 19:48:37.927 - lib.adb - [Tune (m296vsP23aoGAXHoHrULfG)] ADB: firestick-rack1 - input keyevent KEYCODE_DPAD_CENTER
Also, here's what my CDVR Custom Channels setup looks like: