@ElizabethLee
I use a wi-fi remote which I can then control with my home assistant setup (but you can also use their phone app if you prefer).

Specifically, mine is a broadlink RM4 mini.

This is more flexible than a universal remote, as it can record the messages from your original remote and that way you can program whatever functionality you need.

Dunno whether that's something you'd consider, but thought I'd mention it.