It is set to False.
I know that I can set it to true , this is my test of the error handling in PowerApps. I am new to this service.
I have just tried a field validation with the phone field which has a column validation formula (in Sharepoint):
=AND(LEN(Phone)=14,IF(ISERROR(FIND("(",Phone,1)),FALSE,(FIND("(",Phone)=1)),IF(ISERROR(FIND(")",Phone,5)),FALSE,(FIND(")",Phone,5)=5)),IF(ISERROR(FIND(" ",Phone,6)),FALSE,(FIND(" ",Phone,6)=6)),IF(ISERROR(FIND("-",Phone,10)),FALSE,(FIND("-",Phone,10)=10)),IF(ISERROR(1*CONCATENATE(MID(Phone,2,3),MID(Phone,7,3),MID(Phone,11,4))),FALSE,AND(1*CONCATENATE(MID(Phone,2,3),MID(Phone,7,3),MID(Phone,11,4))>1000000000,1*MID(Phone,2,3)<>911,1*MID(Phone,7,3)<>911,1*MID(Phone,7,3)<>555)))
An error message has been thrown on the form submission (a wrong phone number formatting), like this "List data validation failed. clientRequestId: 0329e064-9dcc-4f4d-98ba-" It looks like this kind of validation works, though with no pointing to the field with the formatting issues.
Probably that "required field" is not being processed by the data source (Sharepoint in my case).
