Oh sorry I forgot that, I re did it and this time i checked well exactly as suggested and it is still the same, it is reading each user and replacing each one with that user info, very weird. I attach screenshots. thanks a lot for your patience , really <3
and now it does not create duplicates and just updates, so it is fine on that side, but as soon as there is a new user on M365 Users, it creates the new one but it creates also all the list again,
The condition goes with the expression length(outputs('Get_items')?['body/value']) is equal to 0
And the filter in the Get Items *Sharepoint@
Thanks a lot!