Your Facebook profile picture and cover photo can be seen by different audiences, depending on your privacy settings. Here's a breakdown of who can see your profile picture and cover photo:
Profile Picture: Your Facebook profile picture is always public and can be seen by anyone on Facebook, even if they are not your friend.
Cover Photo: Your Facebook cover photo can be set to be visible to the public, friends, or a custom audience. To view or change who can see your cover photo:
Go to your profile and click on your cover photo
Click on the three dots in the bottom-right corner of your cover photo
Select "View Privacy"
Choose the audience you want to be able to see your cover photo
Keep in mind that some people may be able to see your profile picture and cover photo even if they are not in your friend list. For example, if someone tags you in a photo or a post, their friends may be able to see your profile picture and cover photo. Additionally, Facebook may use your profile picture and cover photo in ads or other promotional materials, but they will always be public and not tied to your privacy settings.
It's always a good idea to choose profile and cover photos that you're comfortable sharing with a wide audience, as they may be visible to people you don't know. If you're concerned about privacy, you can choose not to have a cover photo, or use a generic image instead.