Add a ringtone I created to my Iphone from my MacBook Pro IOS 14.0

I can't figure out how to add a ringtone to my Iphone after upgrading to IOS 14.0. I created it the way I usually do, it has the suffix "m4r" and should be ready to go, but it won't work. I drag it into a window that is for syncing my iPhone, and it lights up with a green "plus" sign, but the tone doesn't show up in my ringtones on the phone. I did a new ringtone a couple of months ago and just dragging it to the window worked back then.

Any help would be greatly appreciated!

Brian