When I built a RHEL 8 VM on Azure, the logical volume (LV) allocated to the partition by default was not sufficient, so I extended the LV using lvextend. Below are the steps I noted.

First, use lsblk to check the allocated volume sizes.

lsblk -p -o NAME,FSTYPE,SIZE,MOUNTPOINT

For example, if the size of / is insufficient, extend it with lvextend.

sudo lvextend -L+10gb /dev/rootvg/rootlv

Then, expand the / allocation on the filesystem side.

sudo xfs_growfs /

After this, checking with lsblk should confirm that the size of / has properly increased.

For /home, the steps would be:

sudo lvextend -L+10gb /dev/rootvg/homelv
sudo xfs_growfs /home

References

jpaztech.github.io

progzakki.sanachan.com