Mhh ok try this.
Right click or press and hold on an empty area on your desktop, and click/tap on New and Shortcut.
Copy and paste the location below into the location area,
now name it Microsoft Edge for the name, and click on the Finish button.
move the shortcut to a destination where you like it ( if you dont want to have it on your desktop )
Again launch Objectdock as admin.
And drag the shortcut you just created onto it or right click objectdock and add it manually.
If you find this too confusing
here is a tutorial for the shortcut explained step by step