How can I use it to give administrator rights to a user from Keycloak via local user admin?

Only OAUTH authorization via Keycloak is enabled. There is a local user with admin rights. How can I use it to give administrator rights to a user from Keycloak?
Login form for local users is disabled, only via Keycloak.

Hi!

This is an EE feature:

Hi,

as your local admin can’t login, there is no possibility to use this account to elevate the privileges of other accounts (oauth-accounts in your case)