Hello
Maybe these cards will help.
https://www.tim-online.nrw.de/tim-online2/
Click on the blue field at the top left with an angle "Kartenauswahl". Then " topographische Karten", then "historische topographische Karten" and then a hook at "1936-1945 topographische Karten 1:25000". Go to your search area and scroll. It changes from the new card to the chosen.
"Mittelfüssen" is not a typical place or name in the area on the Rhine.
Rene