Remember, there is no way to stop package updates entirely in Ubuntu Core unless you pay for "brand store" (which is like $30K/year). You can choose an update

Remember, there is no way to stop package updates entirely in Ubuntu Core unless you pay for "brand store" (which is like $30K/year). You can choose an update window (but at least once per month), pause updates (at most for 90 days) or rollback to previous version (but only until another version is released). If you want more control that than, stop using snap store. Even commercial OSes like Windows or iOS are not that bad!