I imagine it's related to what Sunshine/Moonlight is compatible with. In terms of codecs, Pi4 is the best option (out of the Pi family) for hardware video deco

I imagine it's related to what Sunshine/Moonlight is compatible with. In terms of codecs, Pi4 is the best option (out of the Pi family) for hardware video decoders, Pi5 removed some hardware decoders which is unfortunate.