Vertigo is one of the symptoms of long covid (I have long covid), but so are many, many things.

If it resolved with PT, how did they explain it to you, and did they provide a diagnosis or teach you what to do if it recurred?

Since it recurred and resolved with PT, I’m wondering if you may have had benign paroxysmal positional vertigo (BPPV). It’s one of the most common things to cause vertigo when particles in your inner ear get displaced. It’s treated with specific movements that either a physician or PT would know (or you can sometimes do it on your own at home if you know how to do it), but sometimes it can recur.

This happened to me (I don’t believe it was covid related; it could happen to anyone), and I followed the instructions on this page to see if it was BPPV, and to my surprise, it was! But if you’re already established with a PT, you could talk to them since they already know your situation: https://my.clevelandclinic.org/health/diseases/11858-benign-paroxysmal-positional-vertigo-bppv