Ok now I got the data for SNR and was able to figure out which tuner was being used.
2021/05/16 21:31:00.000886 [TNR] Closed connection to 1048459A/0 for ch12.1 FOX 12
2021/05/16 21:31:00.117893 [SNR] Statistics for "TV/Bob's Burgers/Bob's Burgers S11E21 Tell Me Dumb Thing Good 2021-05-16-2100.mpg": ss=87%-89% snq=74%,43%-87% seq=75%,0%-100% bps=5656275,294784-12880256 pps=536,28-1224 sigerr=32%
2021/04/18 21:31:00.000973 [TNR] Closed connection to 1048459A/0 for ch12.1 FOX 12
2021/04/18 21:31:00.105403 [SNR] Statistics for "TV/Bob's Burgers/Bob's Burgers S11E18 Some Kind of Fender Benderful 2021-04-18-2100.mpg": ss=88%,87%-89% snq=48%,42%-85% seq=1%,0%-100% bps=4469319,0-10830304 pps=396,0-1029 sigerr=98%
2021/05/23 21:31:00.000674 [TNR] Closed connection to 1048459A/0 for ch12.1 FOX 12
2021/05/23 21:31:00.147907 [SNR] Statistics for "TV/Bob's Burgers/Bob's Burgers S11E22 Vampire Disco Death Dance 2021-05-23-2100.mpg": ss=90%,89%-91% snq=51%,46%-57% seq=0% bps=4992144,63168-10230208 pps=455,17-929 sigerr=100%
2021/05/09 21:31:00.000899 [TNR] Closed connection to 1048459A/1 for ch12.1 FOX 12
2021/05/09 21:31:00.087429 [SNR] Statistics for "TV/Bob's Burgers/Bob's Burgers S11E20 Steal Magazineolias 2021-05-09-2100.mpg": ss=90%-93% snq=75%,62%-90% seq=99%,0%-100% bps=5966690,0-12033504 pps=566,0-1143