Thanks for looking into it.
I'm using the Pocophone F1 with a notch (and thus less space up there). Was just testing it again (I'm living at a border) and when I switch to a foreign carrier I don't get any "R". Is was also a smaller one than yours, hovering above the connectivity indicator. Did a reboot in the meantime, but no luck so far. I also did a reset of all the network settings. Didn't change anything either.
Sunrise is roaming for me since it's a foreign carrier. As you can see there's no "R".
View attachment 21799
Not sure if this is about the notch if the symbol has been resized. Some things like the speed indicator seem to hide behind it, but compromises are okay. Any little "R" (no matter how tiny) would be nice tho.