The falkon snap was blocked due to slotting the dbus session bus name org.kde.falkon.desktop - these require manual approval, and I have just approved this per our usual procedure and it now passes automated review. I believe you should have received an email from the store with some details about this when it got blocked but I am not as involved in that side of things, perhaps @roadmr can help advise.
Regarding content snaps, without a special snap declaration, they will only auto-connect between snaps from the same publisher - if you would like a global auto-connect snap declaration issued, you can request one here - which I see you have done in the past for similar snaps Allow global autoconnect kde-frameworks-5-qt-5-14-core18 so following a similar process this time would seem to make sense.
Again re the store UI, @roadmr may be able to comment on that too?