Hi let me explain a few things.
There are 2 ways syncing to partners
A) Partners pull from SA (Runanalyze etc
B) Suunto Cloud sends to a Partners (Strava TP etc)
For any option A or B a resync button would not help as you understand.
For option A) -> Resync button would send again the workout to the queue to be processed by our systems. Since the item is in the queue already and fails due to x,y,z reasons resync it would not help.
For options B) -> Partners are realiable for pulling the workout and thus, again the resync button would not offer any solution.
I hope this helps