https://www.epo.org/en/node/will-my-changes-be-recorded

Will my changes be recorded immediately and displayed in my representative profile?

Changes relating to the details of your entry on the list, such as name, nationality, or place of business, require the approval of the EPO. Changes to your telecommunication data will be changed with immediate effect. However, in case of a combined request (e.g. change of address AND phone number) both will be submitted for approval.