Maybe I am in the same bubble, since I have very little experience with non Samsung devices. I am with Samsung since I am on Android (Galaxy S1, S3, S4, S7 and S10e). My main tablets, outside iPads, have also been Samsung (Galaxy Note 8, yes it was a tablet, an 8in tablet with S pen, before being a phone, and that's why the phone is spelled Note8, and Tab S7+), although I had 2 non Samsung Android tablets, a very old convertible Asus, which broke, and 13.3in Lenovo Yoga 2 pro, which still works but it's too old and stuck on Android 5.
I was convinced that the your phone app worked with any Android phone, but I might be wrong....