TAB completion not working for mounted partition

I'm used to mount a Windows partition (G) into my Windows Subsystem for Linux (running Ubuntu 20.04) by giving the following commands:

sudo mkdir /mnt/gsudo mount -t drvfs G: /mnt/g

Unfortunately, writing in a shell, TAB completion of directories or files for such partition does not work (even if it works well for all the rest).

Things already tried:

• the G partition seems to be mounted correctly, since ls /mnt/g shows all the directories and files within it
• it makes no difference launching WSL with wsl ~ -e bash --noprofile --norc

How could I solve this issue? Thanks in advance!