Cant see or supervise your set up , can you (actually) fabricate your own modifications?

the other way to get clearance is move Higher . might get adequate space with a seat post beam rack

or put spacer- brackets under the bottom mount of the rack to bring it Up.



Racks like Tubus Logo, offer a bit more rearward location

(+ bags with a hook set that adjust via slots, such as Ortlieb [I use that combination])


or maybe consider another bike with longer chainstays AkA.. "touring" ..