Follow up for T6046, from https://dev.gnupg.org/T6046#161722:
There is no accessible feedback when checking/unchecking user ID
This is caused by a bug in Qt which doesn't report the checkable state to AT-SPI.
Edit 2025-07-22:
The bug still exists in KF6 afaik.
To make things clear for testers, those are the check marks which are currently not read by screen readers:
{F26592964}