I have scoliosis and used to have a similar problem. I couldn’t ride a bike for 40 minutes or so without being in a lot of pain. Now I can ride all day and I am fine. I tried physio for years but worked for me in the end was finding a good personal trainer and developing a good strength routine.
For me I realised my scoliosis causes my left arm to take more weight. When I get tired then I lean into that more and then my scoliosis gets worse and I get nerve pain in thoracic region. That inhibited the nerve signal to my left arm which made it weaker and this a vicious cycle continued.
Stuff that helped me:
Dynamic stretching to improve movement was necessary first
Walking lunges (more for the pelvis but everything is interconnected so helpful.
Rows with trx straps (these helped a lot)
Building up my press up strength
Ideally find someone who can teach you one to one so they can help see your inbalances. They need to be good at working with injury so ask locally for recommendations and talk to a few if necessary. Above all don’t give up!