I know virtually nothing about Macs but it appears that you don't have the latest update version. Here is my Windows version Help>About Photoshop Elements dialog with the build number called out. The build number shown in the second line of your screenshot is an earlier release.
As I understand it, the App Store version does not update on the same schedule as the Adobe store version (or the Microsoft Store version for that matter). If there is an update available, it will be installed automatically (although you will be given a choice to install it immediately after launch of the program or upon exit from the program.