From what I’ve seen, they have 1-2 out of Wizarding costumes who are “Guest Experience Support”, they just hold up signs that say to distance and what not. The team members aren’t really in character anymore, I assume that’s the byproduct of the work conditions and loss of morale from layoffs and just the general climate. However, it does affect the experience, they’ve also put up many of those large blue signs about distancing and such, they could have made them themed and more specific to the Wizarding World. There was a few more things here and there but those two are the biggest I could point out at the moment.
EDIT:
Also, within the whole resort, limitations of dining places leave less options, same goes for shopping, many stores are just closed. I haven’t been to Disney since pre-Covid, but one positive thing that I could add is that the character experiences in Suess’ Landing were great!