Map physical channel to another channel? (two antennas/tuners)

So my issue is I have to swap HDHR tuners to record my mother's General Hospital show daily. My HDHR3 won't decode WKRN (Nashville ABC) very well, BUT my HDHR4k WILL. So I wanted to add TWO of the same station, but map it in the guide to another near by ABC that would reference to the HDHR4k, and not the HDHR3. I use two antenna, one for WKRN, and one for everything else. Is there a way to make the guide show up for example 9.1 ABC and it physically maps to the 2.1 WKRN ABC on the 4K? Then have normal 2.1 map to 2.1 on the HDHR3?

Yes, this would be resolved if I could get WKRN on ATSC 3.0. But WNAB's signal on QAM256/PLP1 is too weak. I CAN get QAM256/PLP1 for WZTV 21, for WTVF ATSC 3.0.

Not completely following, but if one channel doesn't come through on one HDHR you could just go to my.hdhomerun.com and disable that channel.

Go into settings and then manage the lineup of the HDHR3. disable the channel by clicking the favorite icon until it turns red then channels will not use it. Now every time you tune to ABC it will default to the HDHR4K. I am doing a variation of this but my issue is the signal is too strong for all but one of my stations. I attenuate the signal 15db so it is not hot, but one station is weak. So I disabled that station on all but one of my HDHR devices that is not attenuated.

I have two different antennas, pointed at broadcast towers in the city I am in + a different close by city. These go to different HDHRs.
Each antenna picks up all the signals, but they are only 100% for the channels in the city that an individual antenna is pointed at.

So, The 1st priority HDHR (with antenna for my home city) gets all the adjacent city channels disabled. Channels will look to 1st priority HDHR first, and if its a home channel it gets tuned as long as tuners are available. If no tuners, it will drop to the lower priority HDHRs. If its a channel for the adjacent city, Channels immediately sees that the requested channel is blocked on the 1st priority HDHR and move to 2nd priority (with antenna for the requested channel).

Exact same thing here. Server & Antenna are located about 45 miles from the major metro area where all the sources are. UHF channels need to run through an amplifier to get a reliable signal, but very low VHF frequency content (like 2 and 6) end up getting interference from low end FM stations closer to the antenna. In those cases, it is better to not amplify those channels, because then you are amplifying the interference.

So I split the antenna feed. One goes to an amplifier, which in turn hands off the the HDHR Quatro. The other split goes straight into the HDHR Duo.

In the main unit (Quatro) I have the low VHF main and substations on 2 and 6 disabled, then in the Duo I have only 2/6 channels enabled, and all the rest disabled. Has cleared up a lot of signal issues on 6 and I get much less notices of signal issues in recordings on it (we don't really watch the VHF 2 channels to know if it helped there).