Go to Setting -> Your facebook information -> Deactivation and Deletion -> delete account

1st of all sign inwith chrome/ other browser not By the app then Click in the top right of Facebook. Select Settings & Privacy > Settings. Click Your Facebook Information in the left column. Click Deactivation and Deletion.

They don't want you to delete it 🤪

first go to the settings section in ur fb app next scrol down til u get something read as"account ownership and control" mnamn then after that u just need to follow the steps carefully!

Go to facebook help and there is help on how to deactivate and next to that delete Then there is a link then it will ask you for your password Then It will diactvate it then after 30 days of inactivity it will delete your fb