Hi folks,
I just found this article (in Polish): https://kb.webcon.pl/integracja-z-aad-przy-pomocy-akcji-wywolania-rest-oraz-microsoft-graph/
The article states: "In the case of implementing a system based on AAD authentication, it may be necessary to manage users directly in O365 from within WEBCON BPS. BPS provides dedicated actions for local AD. For AAD, we can use standard actions available in BPS (REST call action) and the Microsoft Graph REST Service."
It seems there's an error in the documentation, and as Daniel mentioned, these actions are indeed only for Active Directory. I’ll proceed with Microsoft Graph instead.
Thank you all for your assistance!