@seawall @aligorith I feel your pain. Literally. I was diagnosed with frozen shoulder in September. It's WAY better now, but still something I am aware of every day.
I didn't try acupuncture for it, but I have used dry needling* for back problems. I get it from my physiotherapist, so that's an angle to look at.
My first use of dry needles was when traditional physio wasn't getting me "the last 10%" back to normal. It worked. Since then, I've had it included in other treatment scenarios involving my back.
The only direct treatment I had for Frozen Shoulder was a steroid injection, which is supposed to speed up recovery. No idea if it works as there is no control. After a while, I started some basic physio actions to help it remain mobile as it heals.
* Physio says dry needling and acupuncture are different things. GP says "same thing". GP also a proponent of it.