Is there an existing issue for this?
Pain

Spotube is the only application besides steam, that doesnt respect the given window button layout set by the desktop environment. This little screenshot shows a few applications on GNOME. GNOME by default only shows a close button. Spotube always shows minimize and maximize as well.
I dont talk about the client vs server side decoration but general Window buttons. This is in general not limited to GNOME.
Suggested solution
It would be cool if Spotube would follow other applications and use the desktops settings.
Useful resources
This is for Ubuntu Yaru, I dont know if it is of any help here...
ubuntu/yaru.dart#762
Additional information
No response
Self grab