By default, your Facebook profile picture is public, meaning anyone on Facebook can see it, even if they are not your friend. However, you can change your privacy settings to make your profile picture visible to only your friends or to a custom list of people.
To change the privacy settings for your profile picture, follow these steps:
Go to your Facebook profile and click on your profile picture.
Click on the three dots in the bottom right corner of the picture.
Click on "Edit Privacy" from the menu that appears.
In the "Who should see this?" section, you can choose to make your profile picture visible to "Public," "Friends," or a custom list of people.
Click "Save" to save your changes.
Keep in mind that changing the privacy settings for your profile picture will only affect who can see the picture itself, not the other information on your profile. You'll need to adjust the privacy settings for each piece of content on your profile individually to ensure your privacy preferences are met.