I cant use my gmail account with the desktop version of DeltaChat.
While looking for providers I eventually found this site which might have the hints you require:
(I won’t use google services as I value privacy so I cannot help you more)
The link @enacting mentioned says everything, desktop just doesn’t have the oauth2 (most convenient login method) implemented and approved by google, yet.
Here is the issue on github: https://github.com/deltachat/deltachat-desktop/issues/803
@mxlit welcome to the forum, you could generate an “app password” or allow “less secure apps” search for those in your google account settings