Some impressions of the Diagon Alley after it reopened:https://wdwnt.com/2020/06/photos-universal-studios-florida-diagon-alley-social-distancing-measures-in-place/
Most notable things in that the Gringotts coaster has an insanely reduced capacity (although the article implies that people from the same family will get to sit together in a vehicle to themselves). Guessing it won't be quite so extreme for 2-per-row rides.
One thing that's disappointing in a picky way but also a bit concerning is that Universal haven't supplied any themed/printed masks for the staff. A shame from a theming point of view but all the different masks in the photos implies that a lot of staff are using their own personal masks. Hope it's just staff choosing to use their own ones rather than Universal not offering them.