Plasma 6.2 will be released in just three days! In the end we did revert the notification changes, so users of Plasma 6.2 won’t experience any new issues with notifications. The list of verified 6.2 regressions is extremely small, with most being low importance. We will of course eventually get them fixed anyway! But they aren’t release blockers.
Plasma, Plasma… At least they reverted the changes this time and didn’t just leave it as is until they finish the fixes.