#1318 mentioned that self-clean doesn't produce an ir signal, but it only works in some modes. The Silence/FP button is also mentioned, but it was not fully documented. The full codes (from my RG57A6/BGEFU1 remote) are:
const uint64_t kMideaACToggleSelfClean = 0xA20DFFFFFF70; // Mode must be Auto, Cool, or Dry
const uint64_t kMideaACToggleFreezeProtection = 0xA20FFFFFFF73; // Mode must be Heat
const uint64_t kMideaACToggleSilenceOn = 0xA212FFFFFF6E;
const uint64_t kMideaACToggleSilenceOff = 0xA213FFFFFF6F;
Note that the toggles are all in the 2nd byte. The 3rd, 4th and 5th bytes are 0xFF and the checksum is the same logic as the other codes. So the toggles could be shortened to a single byte, and the code updated to populate the other fields and checksum).
The Lennox mini-split wireless controller user manual can be found here: https://coolairsolutions.com/wp-content/uploads/Lennox-Minisplit-Wireless-Remote-M0STAT60Q-1-User-Manual.pdf. The Mr COOL mini-split systems look identical to the Lennox systems, their remote manual can be found here: https://mrcool.com/wp-content/dox_repo/mc-rmt-um-en-01.pdf. I suspect they're the same base-unit just with slightly different control electronics, eg Mr COOL offers a Smart Wifi Kit, but I can't find one for Lennox.
Freeze Protection is also called "Frost Prevention" in some places. Silence is a toggle and actives a lower-than-low fan speed, replacing the fan speed indicator with a picture of "a person holding their index finger up to their mouth" ("hush").
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