Well this is a weird coincidence. I’ve had exactly the same issue as the op, I keep a weird stock system, when I find running trainers I like I’ll buy 2 or 3 pairs.
None of them fit anymore and are causing me all sorts of issues, I also find me feet are wider and longer.
I’ve been running much more since march 2020 so this might be a contributing factor.
I have also had symptoms very similar to covid toe which was really sore, but that’s finally cleared up now. I don’t think the 2 are related, but the smaller shoes (relative to my feet, they didn’t actually shrink) probably aggrivated the soreness of my toes.