Considering the recent harmony debacle I modified the AV Remote Card to not be dependent on it but rather to use scripts to control media devices that are already connected to home assistant.
I don’t know the best way to share this so if anyone would like to help me with this portion I would be appreciative. Until then here are hastebin links to my scripts and my card configuration (card is done in configure UI so YAML will require some modification). Will require you to modify the scripts and cards with your media entities.
Scripts:
https://hastebin.com/apacajosom.css
Remote Control Card
https://hastebin.com/esawidodut.sql