when I went on estrogen I was surprised how much strength I lost, especially grip strength. I couldn't open jars that I'd been previously able to brute-force through. I hadn't been working out either before or during transition. I've heard muscles are "use it or lose it" on hormones - you can retain the increased strength from testosterone - somewhat - through training, but if you don't it's gone for good.
I should consider it. I have EDS, which disproportionally affects women for hormonal reasons. T might help me build muscle to compensate for my elastic connective tissue. but I remember feeling like I'd been poisoned when I had to go off hormones for a while and felt T come back. couldn't hurt to try though.
A blood test might be a good start. My suspicion is that if you're at or below the typical range for cisgender woman, you might have more room for adjustment before feeling poisoned.