@Karsten_FRIEDRICH this is not possible and Microsoft will never implement this. If a form has been set to anonymous there is no way to find out who submitted it. And if a responder has been told or thinks that their response is being submitted anonymously it would be very bad practice - and illegal in many territories - for you to then be able to find out their details. If you need to find out who in your organisation submitted the form then you can't set it to anonymous.
Rob Los Gallardos Microsoft Power Automate Community Super User