Are you sure the forks are boost forks? Both boost and non boost 20mm forks use 110mm wide hubs. The only difference between boost and non boost 20mm hubs is that the spoke flanges are slightly further out, pushing the disc rotor further out. They are both 110mm wide. The only difference between boost and non boost 20mm forks are that the brake mounts are located slightly further out to allow for the disc being closer to the leg. Just because they take a 110mm hub doesn’t mean they are boost forks, 20mm hubs have always been 110mm wide. Trying to fit a boost 20mm hub on a non boost fork would result in exactly what you are experiencing https://www.notubes.com/news/say-what-the-difference-between-20x110mm-thru-axles-and-20x110mm-boost-thru-axles-explained/
No worries, sorry to be the one to give you bad news. All these changes can be a nightmare to get your head around and regularly cause us to make expensive mistakes
I had the same problem with Discobrakes 203mm floating rotors being too thick and rubbing at the rivet attachment, fork and frame. I bought Shimano Icetech 203s and they fit fine.
It appears in the pictures op provided, that the rivets on the floating disk are causing the issue... I recommend trying a solid disk first, maybe try "borrow" one from a friend before buying
OMG I think you must be right ! So that means I need a new wheel or a new fork ...
thanks for the clarification
No need for new wheel or fork, just put a washer in between the hub and rotor that solve my problem, i got a boost fork and bought a non boost wheelset for a bargin