Interesting https://www.youtube.com/Switzerland is still mine, but my user handle is gone. https://www.youtube.com/@Switzerland goes to swiss tourism but they have the handle @switzerland
Easy fix: use youtube without a channel, e.g. using newpipe or yt-dlp.
Did you ever have it? When they introduced handles you had to specifically claim that name, otherwise you get @(name)-(random), it doesn't matter if you had /Switzerland as a channel url.