No thoracic spine curve... ideas for stretches?

[Orangio]

I think it's possible I've always had this, or at least since childhood anyway. I have an insufficient curve in my thoracic spine (confirmed by a physio). My lumbar spine is normal. I don't have any history of conditions or surgery etc which could have caused it. I don't know if it's that my bones are wrong or if it's just that the muscles are chronically tight and could be stretched out. The physio wasn't that interested in it, as it only causes me muscle pain and knots etc, rather than seriously impacting my life. Yes, I know I could persevere with more NHS help, but they're pretty busy just now and it's not something major, just sore and achy.

There's not much info online so I guess it's a bit unusual, but I just wondered if anyone else had successfully stretched this area and managed to improve the curve and reduce pain? If so how?

Yoga. An actual class NOT You tube videos! Ideally someone who will work with you one on one

once you’ve been doing it a few months I’d get sports massages too

Definitely worth a shot, thank you!
I've tried quite a bit of yoga before, but never really found any stretches/positions which tackle that area specifically, or at least not enough to make a difference to me! I am not a yoga expert though by a long shot so perhaps worth paying someone one-to-one for a couple of sessions. Will bear in mind if nobody else has experienced similar and solved it. Thanks Angelica

Hopeful bump