No he just tells us he became our father.
Nope.
In the introductions of his writings Paul never uses the title of Father.
No where.
You still have not resolved the command of Christ to "call no man Father".
Paul did not use it as a title. If he had he would have been in contradiction of His command.
You're arguing with the command of Christ.
Jesus command is to CALL no man, no religious leader, by the title of father.
Paul’s comment does not change that or contradict that.