ln -s /mnt/c/Users/MyName/.ssh/id_rsa ~/.ssh/id_rsa
ln -s /mnt/c/Users/MyName/.ssh/id_rsa.pub ~/.ssh/id_rsa.pub
or
ln -s /mnt/c/Users/Myname/.ssh ~/.ssh
wsl --export MyDistro ./distro.tar
To restore:
mkdir ~/AppData/Local/MyDistro
wsl --import MyDistro ~/AppData/Local/MyDistro ./distro.tar --version 2
Then set it as default:
wsl -s MyDistro
(what is "MyDistro"? wsl -l
will tell you the name it goes by)