How to restrict access to flexfields by business unit at the purchase request distribution level?

Hello,

An attempt is being made to restrict access to flexfields at the purchase request distribution level in version 24A (11.13.24.01.0) but there are problems displaying flexfields that are within a context on the requisitions screen.

A set of values was configured where all the business units are and this was entered in the context segment so that it can restrict the access of the flexfields to the business unit, after that the context-sensitive segments were configured but these are not can be displayed on the purchase request screen, although sandboxes are already activated, only the context segment can be displayed