Nowhere does God select Matthias, but Paul is an Apostle chosen by God and given the spiritual gift as an Apostle.
Matthias was chosen by the other 11 Apostles who were too impatient to wait for God to select Paul.
..so you believe God wanted Paul to sit on one of the twelve thrones, judging the twelve tribes of Israel, when Christ returns to set up His kingdom? (Matt. 19:28).
I thought while they were replacing Judas, Paul was tending to the belongings of those martyring Stephen; he didn’t seem to be looking for a new line of work at the time.