I don't know, I found the best way to fix issues with my posture was to strengthen my core and shoulders, while increasing flexibility in my hamstrings, hip flexors, and shoulders.

I also never brought my aeron chair home from my office space when the lockdown started and for the past year I've used a cheap piano bench at my desk that has no back. Forces me to stay upright all day and it's been surprisingly great.

There's really no device that's going to do it for you, strengthening and stretching even a little bit goes a long way.