I know your problem all too well. Sometimes I feel I am copying/pasting between channels more than doing other things. Luckily that is about to wind down a bit, together with winding down my advocacy activities.
It may be indeed be a good idea. Though currently there's not a proper "semantic" overlap, if you will. Delightful project can have lists on anything, but is not federated.
(Note: Both on integrated channels as well as delightful project I have fedi ideas pending)