Hi @Ralph Jansen ,
Thanks for reaching out.
I would say, some of the Entra ID limits apply to B2C as well. Not all are feature limits specified in Entra ID limits document are applicable to B2C.
There is no specific limit for App Registrations in a tenant. The limit is for overall number Directory Objects in a tenant, which includes, Users, Groups, Applications, servicePrincipals and so on.
Hope this will help.
Thanks,
Shweta
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