Zend certified PHP/Magento developer

Unallocated space (ubuntu 22.04.04)

I just set up a small home server and when I looked at its total disk space it said 100G. So I took a quick look into lsblk and this was the output:

NAME                      MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
loop0                       7:0    0  63.9M  1 loop /snap/core20/2105
loop1                       7:1    0  63.9M  1 loop /snap/core20/2264
loop2                       7:2    0    87M  1 loop /snap/lxd/27037
loop3                       7:3    0    87M  1 loop /snap/lxd/28373
loop4                       7:4    0  40.4M  1 loop /snap/snapd/20671
loop5                       7:5    0  38.7M  1 loop /snap/snapd/21465
nvme0n1                   259:0    0 953.9G  0 disk
├─nvme0n1p1               259:1    0     1G  0 part /boot/efi
├─nvme0n1p2               259:2    0     2G  0 part /boot
└─nvme0n1p3               259:3    0 950.8G  0 part
  └─ubuntu--vg-ubuntu--lv 253:0    0   100G  0 lvm  /

As you can see 950.8G of my total disk space are not allocated. Could somebody help me out here, because I don’t really know what to do. Thanks!