How to Extend Free Disk Space for Macos

Extend disk with diskutils

Delete partition “Free Space” to extend disk to current macos partition.

Fixed Error “The new size must be different than the existing size”

#repair (internal, disk0 - in your case)
diskutil repairdisk disk0

#resize (synthesized, disk1 - in your case with HS)
diskutil apfs resizeContainer disk1 0

Reference

1. Cannot resize APFS partition - “The new size must be different than the existing size”