Multivalued attributes in account-manager

Hi,
First: Keycloak does everything I need and I could successfully secure many Web Applications and can keep my LDAP up to date. Many thanks!

But there is a little bit I would really appreciate:
It would be nice if, for example, a user has multiple phone numbers, they could update them themselves with the account-manager. I haven’t found any options for multivalued entries for the .ftl file.

Any advice?

Thanks in advance!