I’ve been able to screenshare with flatpak Discord on KDE Wayland, without sound (same as X). 8 months ago a Discord dev said “Linux users will see audio sharing supported when we upgrade webrtc and are able to find the time to hook it up to pipewire”. You might be thinking of PTT not working when the Discord window isn’t focused, some workarounds exist for that.
Mastodon is an awesome name. Calling their tweets “toots” however…