Navigate to Facebook.com
You need to switch to the Page you want to edit the access on to edit/update/remove access.
Click on your profile image icon. Top right.

Click on the page you want to edit access on.

Click on the profile icon, top right, again.

Click on "Settings & privacy"

Click on "Settings"

Click on "Page setup"

Click the arrow next to Page Access

Click the 3 dots next to the profile you want to remove access on. If you didn't create the page (aren't the owner) your name should be on the list).

Click on "Remove Access"

Enter your FB password. This is to confirm it is you doing it and a security thing.

Click on "Confirm"

Done 🚀 A refresh of the page should then show you as not having access.

In some instances it isn't instant. You might then need to go back to your profile and approve the request. But equally you may be removed instantly.

To remove access, you must first switch to the specific Facebook Business Page from which you want to remove someone's access. This ensures you're making changes to the correct page.
After clicking the 3 dots next to the profile you want to remove, select "Remove Access". You'll then be prompted to enter your Facebook password to confirm your identity and the removal request. Finally, click "Confirm" to finalize the process.
In some cases, the removal of access might not be immediate. You may need to refresh the page or go back to your profile to approve the removal request. However, in other instances, the access might be removed instantly.
This step is a security measure by Facebook to ensure that only you, the account holder, can make changes to page access. It helps prevent unauthorized removal of access by others.