Yes, well, here in my city at the university there are two doctors with a certain degree of specialty in LC. One of them is a pulmonalogist, the other a rheumatologist.
I think that makes sense given the variability of symptom presentation we all have, and joint problems or lung problems are pretty typical of LC, along with others, e.g. digestive issues.
Since you sound as though joint problems are your issue, i guess a rheumatologist makes sense. Again, hopefully it's a doctor who is familiar with and understanding of LC, specifically.
Autoimmunity, inflammation, dormant virus re-activiation are just some of the theories behind the mechanism(s) of LC, and it seems that the jury is still out on which one is responible, or, perhaps there are different mechanisms with different people.
Personally, I lean toward the involvement of UFO activity, but that's just my personal take--no NIH-funded studies as yet.
Best of luck!

I have seen a couple rheumatologists for tendon pain in Achilles, knees, elbow and hip. I have been on all the tough drugs and had zero improvement. My frustration is massive. I’ve suffered for 3 years with no help. It looks like psoriatic arthritis, but isn’t. I have no solutions, but if you find some please share!

Celia 16th,
Keep the appointment. Who knows, she may have some new ideas. Nothing to lose, can't hurt to hear what she can offer.
Nobody knows all about this darn Covid. Its's all trial and error now. You should take every chance you get to hear from a doctor.
Good luck and blessings to you!