Totally agree with everyone else - we were just there at two different points this weekend (Saturday evening for drinks and Sunday morning for brunch), and Saturday night was a mess. Sunday morning was much better.
On Saturday night, it was very crowded, wall-to-wall people walking around, and mask wearing nowhere near the level of compliance we saw everywhere else in WDW. Even if Disney wanted to enforce things better at DS, they simply don't have anywhere near the amount of staff walking around DS as they do in the parks. We were there for drinks at Wine Bar George, and we walked from the east side rideshare drop-off to the wine bar. We walked as fast as we could to our destination (which was totally fine and enjoyable once inside), had our drinks, and did not linger in DS when we were done.
It was better on Sunday morning when we returned for brunch around 10:30. It was not crowded at all when walking around, so we felt totally comfortable then.
If you're worried about crowds, I would think twice before visiting on a weekend evening in particular, and try to time your visit for more of off times if you want to be at DS but not worry about crowds.