`flatpak run com.freerdp.FreeRDP` works but there is on UI so it's only useful if you intend to use the console to connect. Good luck.
It's working with "flatpak run com.freerdp.FreeRDP", so don't try "xfreerdp". My only problem is with Ctrl + Alt + Delete, can't figure out why windowed mode doesn't turn on. Wish there was a way to start application windowed specifically
Installed flatpack from software manager. Doesn't launch and isn't in any of the system menus.