I know it's not the same in the US. My current T (he's been in practice 17 years) does not get supervision, but he meets regularly with a consulting group of other T's so they can discuss cases. And I know he's consulted individually with another T on cases, too (I know this because it was my ex-marriage counselor with whom he was consulting, as they used to work together and both work with teens). And in my ex-MC/ex-T's practice, they had a weekly clinical meeting, where they could discuss difficult cases. But no actual supervision.

I know supervision is required when a T is in training, like a psychologist (PhD) or social worker (LCSW) would need a certain number of hours of supervised sessions. And I think they have to do their own therapy as part of training. But to my knowledge, it's not continuous throughout their careers like in the UK.