In fact it's a bit strange how there isn't more anti-psi tech in Underrail (anti-psi field generator, psychic nullifier collar/straight jacket, mind reading resistant/immune helmet, etc).
I'm actually more surprise how there isn't any cyborg and/or biological augmentation since BioCorp already seems to done tons of research on them.
Edit: in most media mind readers are usually treated w/ contempt and/or suspicion. With the Lunatics wreaking havoc I can see the general Underrail population being very wary of psi users, a la X-men.
IIRC the crafting text of psionic headbands it says they can amplify the user's psionic schools as well they can be used as inhibitors, so it means there is at least one basic method to restrain unstable psionic users.
I'd really want to see cybernetic implants probably in future underrail releases, not like the ones Buzzer and Balor uses (They look mostly rudimentary and just for sake to look robotic), but the type that improves your combat performance, Protectorate would seriously go crazy to make cyborg supersoldiers.