Missing maximize and minimize buttons in snap and flatpak, Gnome on Wayland (Ubuntu 20.04)

Summary:

Missing maximize e minimize window buttons on Ubuntu 20.04 - Gnome on Wayland

Steps to reproduce:

• open Inkscape

What happened?

Missing maximize e minimize window buttons

What should have happened?

Showing functional maximize e minimize window buttons

Version Info:

- Inkscape Version: 1.0 
- Operating System: Ubuntu
- Operating System version: 20.04