I have been using Channels with 2 prime tuners and cable cards for some time now. They have notified me that the cable cards will eventually cease to work. However they do not have a android tv app and my whole ecosystem is Android TV platforms so I need to know if all of the spectrum channels will work through tve?
Tve should work, give it a try 
Also, if possible would definitely recommend getting a HDHomeRun with 4 tuners. If you are able to put up an antenna.
On my Spectrum Select 125 account I get the following channels TVE... and its a bunch.
6000 WGBA WGBADT (NBC)
6001 WBAY WBAYDT (ABC)
6002 WLUK FOXC (FOX)
6007 CSPAN CSPANHD
6008 CSPAN2 CSPN2HD
6009 CSPAN3 CSPN3HD
6010 CC CCHD
6012 MTV MTVHD
6014 VH1 VH1HD
6016 CMT CMTVHD
6018 BET BETHD
6020 TVLAND TVLAND
6022 PARAMOUNT PARHD
6030 CNN CNNHD
6031 HLN HLNHD
6032 CNNI CNNI
6033 TBS TBSHD
6034 TBSP TBSHDP
6035 TNT TNTHD
6036 TNTP TNTPHD
6037 TRU TRUTVHD
6038 TRUP TRUTVHP
6041 TOON TOONHD
6042 TOONP TOONPHD
6043 AETV AETVHD
6044 HISTORY HISTORY
6046 LIFETIME LIFEHD
6050 MSNBC MNBCHD
6051 CNBC CNBCHD
6052 USA USAHD
6053 USAP USAHDP
6054 SYFY SYFYHD
6055 SYFYP SYFYHDP
6056 E EHD
6057 EP EPHD
6058 BRAVO BRAVOHD
6059 BRAVOP BRAVOHP
6060 OXYGEN OXYGNHD
6061 OXYGENP OXYGNHP
6070 NGC NGCHD
6071 NGCP NGCPHD
6073 FNC FNCHD
6074 FBN FBNHD
6080 FX FXHD
6081 FXP FXPHD
6082 FXX FXXHD
6083 FXXP FXXPHD
6084 FXM FXM
6085 SUNDANCE SUNSTR
6086 AMC AMCHD
6087 BBCA BBCAHD
6088 IFC IFCSTR
6089 WETV WETVSTR
6090 HALLMARK HALLHD
6091 HALLMARKMM HMMHD
6101 DISCOVERY DSCHD
6102 FOOD FOODHD
6103 ANIMAL-PLANET APLHD
6104 HGTV HGTVD
6105 TLC TLCHD
6106 TRAVEL TRAVHD
6107 INVESTIGATION-DISCOVERY IDHD
6114 MOTORTREND MTHD
6120 DISNEY DISNHD
6121 DISNEYP DISNHDP
6126 FREEFORM FREFMHD
6127 FREEFORMP FRFMHDP
6140 ESPN1 ESPNHD
6141 ESPN2 ESPN2HD
6142 ESPNU ESPNUHD
6143 ESPNEWS ESPNWHD
6144 SEC SECH
6145 LONGHORN LNGHRNH
6147 ACC ACC
6197 FS1 FS1HD
6199 BTN BIG10HD
6700 AS-RICKANDMORTY
6701 AS-THEERICANDRE
6702 AS-THEVENTUREBROS
6703 AS-OFFTHEAIR
6704 AS-MRPICKLES
6705 AS-ROBOTCHICKEN
6706 AS-BLACKJESUS
6707 AS-AQUATEENHUNGER
6708 AS-SAMURAIJACK
6709 AS-INFOMERCIALS
6725 FXW FWX
6750 BUZZR WYBNLD (BUZZR)
6751 COMET WRGBDT3 (COMET)
6752 CHARGE WCWNDT2 (CHARGE)
6753 CONTV CONSTR
6754 REVN WYBNLD5 (REVN)
6755 TBD WRGBDT2 (TBD)
6756 DOVE DOVESTR
6757 NASA NASA
6758 NBCNEWS NBCNN
6759 NEWSNET NYBNLD8 (NEWSNT)
6760 CHEDDAR CBNSTR
6762 ETLIVE CBSETL
6764 NEWSMAX NEWSMXH
6765 CBSSPORTSHQ CBSSPHQ
6766 CBSNEWS CBSNSTR
6767 ABCNEWS ABCNL
6768 BLOOMBERG BLOOMHD
6769 NHKWORLD NHKWRLD
6770 COURTTV COURT
6771 DW DWEUR
6772 CAS CASHD
6773 CMCUSA CMCUSA
6774 CMC CMC
6776 WEATHERNATION WTHRNHD
6777 PBSKIDS WNETDT2 (HD06)
6778 FSTV FSTV
6780 ALJAZEERA ALJZENG
6781 DABL DABL
6782 STADIUM WCWNDT4 (STADIUM)
6783 AMGTV AMGTV
6784 LX LX
6785 RETROTV RETROTV
6786 HEARTLAND HEARTHD
6787 POSITIV POSTHD (POSTV)
6788 TASTEMADE TASTE
6789 NEWSY NEWSY
6900 EWTN EWTN
6901 EPLUSTV EPLUSTV
6902 GLOBALNEWS GLOBAL (GLOBAL)
6950 EVINE SHPHQHD
6951 HSN HSNHD
6952 HSN2 HSN2HD
6953 QVC QVCHD (QVC)
6954 QVC2 QVC2HD
6955 QVC3 QVC3HD
6970 NY-CBSNEWS CBSNWNY
6972 LA-CBSNEWS CBSNWLA
6973 LA-KTLA
6974 BOS-CBSNEWS CBSNWBO
6975 SF-CBSNEWS CBSNWBA
6976 MINN-CBSNEWS CBSNWMN
6977 DEN-CBSNEWS CBSNWCO
6978 PIT-CBSNEWS CBSNWPI
6979 PHI-CBSNEWS CBSNWPH
6980 CHI-CBSNEWS CBSNWCH
6981 DAL-CBSNEWS CBSNWDF
6982 SAC-CBSNEWS CBSNWSA
6983 BAL-CBSNEWS CBSNWBL
6984 NY-ABCNEWS
6985 LA-ABCNEWS
6986 SF-ABCNEWS
6987 CHI-ABCNEWS
6988 PHI-ABCNEWS
6989 HOU-ABCNEWS
6990 FRESNO-ABCNEWS
6991 RALEIGH-ABCNEWS
6992 MIA-CBSNEWS CBSNWMI
Obviously my locals are in there too, but you can get the idea.
You can check Channels TVE Support for Spectrum https://getchannels.com/docs/channels-dvr-server/tv-everywhere/availability/#Spectrum
@mguebert you could enable TVE as a secondary source, then when/if they pull the cable card plug your passes will still record and you wont miss a beat. Also as others have suggested, might be good to plan to put up an antenna and be ready. Especially if you dont get all ota channels through TVE.
Glad I get all the channels I watch through TVE even though they are stereo in the event my primes stop working.
I have Spectrum Choice which is OTT streaming service they sell if you also have Spectrum internet. It used to be 10 channels you can select and now it's 15. I did it about a year and a half ago when I found out 80% of the channels via the cable card were copy protected so I couldn't use them with Channels directly.
However, every channel I get with the exception of the CBS Sports Network also have a TVE option.