Hi @Shraddha desai ,

UI Policies work on the form, so if you just need the field to be mandatory or read only  then making ui policies (for individyual tables/forms) makes more sense. If you want the fields to be mandatory regardless of the source(not just form)you can look for  Data Policies and see what suits you best

Configure Dictionary should not be considered to just make a field mandatory or read only at the first place.

Mark my answer correct & Helpful, if Applicable.

Thanks,

Sandeep