Parted has no 'resize' command available
Solution 1:
Yes, it is normal.
From the GNU site:
Note that after version 2.4, the following commands were removed: check, cp,
mkfs, mkpartfs, move, resize.
Solution 2:
Most modern OSes now include the CHUI version of parted 3.2 which has resizepart instead:
(parted) resizepart 2 100%
You should find it in your package manager.