from here https://askubuntu.com/questions/1106795/ubuntu-server-18-04-lvm-out-of-space-with-improper-default-partitioning

1. # We need to resize the logical volume to use all the existing and free space of the volume group
$ lvm
lvm> lvextend -l +100%FREE /dev/ubuntu-vg/ubuntu-lv
lvm> exit

2. # And then, we need to resize the file system to use the new available space in the logical volume
$ resize2fs /dev/ubuntu-vg/ubuntu-lv

after reboot and remote log in I get this

  System load:  0.5                Processes:               178
  Usage of /:   40.7% of 57.58GB   Users logged in:         0
  Memory usage: 5%                 IPv4 address for enp2s0: 192.168.1.112
  Swap usage:   0%

Seems to have fixed the problem.