Recently I installed exfat drivers under ubuntu-mate-noble 64bit under my
berryboot system. They did not work for me so I followed what exfat drivers
are working under my Raspbian buster also under my berryboot system. 

I located the following Debian-buster 64bit components:-

"exfat-fuse_1.3.0-1_arm64.deb" and "exfat-utils_1.3.0-1_arm64.deb".

To install them firstly remove any non working exfat components you may
have installed.

eg. sudo apt-get remove exfat-fuse

I then installed the Debian-buster 64bit components simply by clicking on
the files.

To prevent the newer non working drivers from updating you I then typed
the following:-

sudo apt-mark hold exfat-fuse

When you feel ready to update exfat-fuse again you can do the following:-

sudo apt-mark unhold exfat-fuse