A foot path exists here that connects the path along the Main river with Rüsselsheimer Straße. I can confirm as I was on-site and used it, October 2023. It exists for at least 10 years and it is clearly visible on aerial fotography.

My creation of that path was recently deleted by another user claiming it didn't exist, see changesets https://www.openstreetmap.org/changeset/143375785 (creation) and https://www.openstreetmap.org/changeset/144282938 (deletion).