Do any of the Outer Planes interact oddly with psionics? If so, how? If it’s possible to answer, even in speculation, why?

2E in particular had some odd planar rules - no illusions in Mechanus, for instance. Is there reason to think that said rules would or would not apply to analogous psionic powers?

In general, what (if anything) differentiates “merely” belief-based phenomena from psionic phenomena on the Outer Planes?

Is there any particular reason (aside from psionics being a subsystem and thus not a high publication priority, I mean) that psionics seems so sparsely represented on the Planes?