It hasn't been ported over to Plasma 6, any widgets that were on 5 need to be updated to work, unfortunately. So if there are any widgets that have been abandoned, that's it for them. No clue if Clear Clock has been abandoned, but it hasn't been touched since release, so that's concerning.
Anytime I click a Reddit link it tries to force me to sign in before I can look at anything, or tries to force me into the app even if I do sign in sometimes. It's gotten to the point that I just completely ignore Reddit now since it's so difficult just to view it..