The Align-Distribute Grease Pencil Strokes add-on allows users to align and/or distribute selected Grease Pencil strokes along the X or Z axis. in the 3D Viewport. This is useful for creating uniform arrangements of strokes in Grease Pencil.
It's already approved so you can find it when you go to Preferences > Get Extensions > Align-Distribute Grease Pencil Strokes