I'm an Admin except in Sharing & Permissions for Harddrives

I'm the owner and only user of my laptop. I recently encountered an issue trying to use an application and got the error that I didn't have permission to grant it access to my disk. This prompted me to click on Macintosh HD in my Finder sidebar where I noticed my name User account in not listed under Sharing & Permissions. System (Read & Write), Wheel (Read Only), and Everyone (Read Only) are listed. When I try to add myself, it says, "The operation can’t be completed because you don’t have the necessary permission."

Same with my external SanDisk Extreme SSD.

Did something change?