How to hide date of birth in Person tab of incident

When we add an internal employee to an incident, the date of birth is automatically displayed. Worried about GDPR, we would like to remove this field.

In field control, the only reference to Date of Birth appears in EHHSS_INCIDENT / PERSON_DETAIL / IS_COMPANY / DATE_OF_BIRTH, where the options are ENABLED, READ ONLY and MANDATORY.

In our sandbox system, I have removed this entry, but the DoB is still shown. Does anyone know how I can achieve the desired result?

Also (if you can answer that, maybe you can answer this!) I need to make the LOCATION field mandatory on the incident, but cannot find this anywhere the standard field control...