Yes but...
- The above. Needs high immunity. Not hard to achieve, but if it's not rated, who knows? Also, if you're using GaN, I would definitely want to see a rating, since the dV/dt is just so high.
- Isolation is usually poor, functional 1kV for example. This may be technically adequate, but it may also lead to poor reliability versus a proper reinforced barrier.
Expect to pay more for parts with these ratings, or by solving it yourself with a discrete supply (and probably custom magnetics).
Tim