All my personal details on Facebook are (and have always been) false. My phone number is the number of a hotel in Monte Carlo. When Facebook nagged me to give them my mobile number for 2fa I ignored them. My friends thought I was crazy. I know it's not exactly gracious of me but feeling very self righteous right about now.
This is basically the only reason I don't "delete" my Facebook account. I have so many family members and friends that I cannot realistically prevent putting pictures and the like about me on Facebook.
At least I can see some of what Facebook has about me instead of none.