For IR remotes, there are a few ways to go about it. If you have a remote you want to clone, you can just use the flipper to clone and map buttons to a custom remote. If you don't have the remote and have a common device (like TVs), I would check this repo on Github [0] and see if you can find a compatible IR file. Note, you need a micro SD card in order to move the files onto the flipper, but a small one works fine.
I've had good luck with the basic universal remote when I'm in a pinch. Also, you can create custom IR files, but it can be a pain with encoding. The flipper forums are a good resource too [1].