while it has never been mentioned, surely a transfer and a season loan back to the NIx is the ideal option
According to many here when Stefan was playing 3rd division Germany, it was a pub league
Marinovic played 11 games in 3 Liga.
By far majority of his German career was in the 4th tier, which consists of about 90-100 clubs spread over the various regional leagues.
https://us.soccerway.com/players/stefan-marinovic/85012/
By the way according to Soccerway this is the current Bayern Muchen II squad. Contains obligatory German born young American.
https://us.soccerway.com/teams/germany/fc-bayern-munchen-ii/5523/
I note 18 yr old Canadian wunderkid Alphonso Davies (ex team mate of Marinovic's at Vanouver) got 6 starts last season, for the Bayern first team. Bayern paid € 10M for him.