I'm not sure how that would work with those being two separate sets of developers + instance admins. I don't even think you can do instance admins + Lemmy devs in one place.
Server admins, responsible for whatever instance you're browsing from and whatever instance the post is on (I use lemmy.dbzer0.com, you're on sh.itjust.works, these are two different admins/teams of admins)
App devs, in Sync's case ljdawson
Are you looking for a single donation to go to all of these groups?
Personally I'm waiting for my instance admins to set up some donation channel to make sure it keeps going.
IMO it's preferable to donate separately, otherwise you have yet another intermediary trying to take a slice of the pie.