The NFL is just very different than MLB. Non-guaranted contracts, more marginal players. Even the young ones, if they don't project as future starters, are basically expendable/interchangeable.
Whereas the Phillies obviously would not be willing to just release (or even trade away) Bailey Falter. Let alone Aaron Nola.
If this continues to be a factor in the off-season (i.e. if there's not simply a mandate) they'd certainly have to consider it as they make roster decisions. I also suspect those roster decisions may tell us a bit more about who wasn't vaccinated (and/or influenced others to not be), though at the end of the day it seems clear at least some of the best players (besides Nola) are part of that group. And somehow have avoided addressing the topic.