Hi Vladimir, After going for your last proposal, it works at least considering the GNOME session. Here is what log shows:
systemd[2671]: Listening on foot-server.socket. systemd[2671]: Starting foot-server.service - Foot terminal server mode... systemd[2671]: Starting waybar.service - Highly customizable Wayland bar for Sway and Wlroots based compositors.... systemd[2671]: waybar.service: Skipped due to 'exec-condition'. systemd[2671]: Condition check resulted in waybar.service - Highly customizable Wayland bar for Sway and Wlroots based compositors. being skipped. systemd[2671]: foot-server.service: Skipped due to 'exec-condition'. systemd[2671]: Condition check resulted in foot-server.service - Foot terminal server mode being skipped. Many thanks, Patrice