I would have personally ascribed this to fever dreams, but sounds like that was not it exactly? I ask since you specifically mention them almost as a sort of separate thing.

I did also have Covid for the first time only very recently myself, though I did not notice a marked difference in my dreaming, I also barely slept for a few of the days during which I was ill. I did have a particularly long dream around this time but it was really not that different from many other dreams I have had in the past, ill or not.

Recall was actually good while I had Covid, possibly because of generally more interrupted/non-linear sleep, but because I was so tired I think I rarely noted any recall down at all. On that note, while I did have a fever, it was actually not as high as the fever I had from the vaccinations.