In the USA, there's Private MD Labs, ULTA Labs, and Synergistic Labs[0]. In the UK, there's Medichecks and Thriva. I expect there are similar options in other countries.

However, these general blood tests won't test for PFAS: https://news.ycombinator.com/item?id=31125559

[0] https://www.reddit.com/r/steroids/wiki/bloodwork/list