I'm done with the bootable thumb drive I used to install Debian 11 with, so now I want to reformat it. If you want to format a thumb drive, you probably want to make it exFAT. Debian 11 uses Linux kernel 5.10
$ uname -r 5.10.0-8-amd64   which has native support for exfat! There is a new package for it called exfatprogs
sudo apt install exfatprogs   So the exfat-fuse package is no longer required