Not only that - the MiRemote you named does have full camera access, microphone access and full internet access 
But indeed MacroDroid even worse with 6 trackers and wanting all(?) 108 permissions that a device can offer - probably can’t expose a device more 
While I’m very much for using old hardware and give them a second or third life this application here might be the worse IR remote in terms of privacy. I don’t want to fear that my IR blaster records audio and video and send that to strangers over the world wide web 
That said an invest of only a few dollars for a esp based IR blaster running esphome might be a good invest if privacy matters 