There are some Amateurs who’ve used the 2200m and 630m wavelength bands. Mostly using Morse Code, FT8 and WSPR modes as they are narrow bandwidth weak signal modes.
https://www.qrz.com/db/?callsign=dl4eai
In fact some of them appear to be transmitting FT8 even today.
https://pskreporter.info/pskmap.html?preset&callsign=ZZZZZ&w...