iCloud Photo Albums

Hi pwortihy252,

Please follow this instruction

Rearrange albums

1. In the Photos app  on your Mac, click My Albums in the sidebar.
2. Do any of the following: 

• • Order albums by date: Choose View > Sort, then choose By Oldest First or By Newest First. 
  • Rearrange albums manually: Drag the albums into the order you want.
  • Order albums alphabetically by title: Choose View > Sort > By Name.

Here the full instruction

Create and work with albums in Photos on Mac - Apple Support

You can also click My Albums in the sidebar and then do right mouse click

Regards Ralf