Changelog:
Rewritten with Flutter
Support ipv6 (beta)
Strengthed password
Quick support feature
Hardware codecs H264 / H265 (beta)
AV1 codec
International keyboard (Map mode and translate mode)
Wayland support (beta, known issues #4276 (comment))
Privacy mode (beta, Windows only)
Headless Linux
Virtual display (Windows)
Resolution adjustment
Dark theme
A lot of improvements (#918)
https://rustdesk.com / https://github.com/rustdesk/rustdesk/
That looks right actually, so they had been using Flutter already for mobile and finally decided to align their desktop codebase to it too, makes sense