Question about Galaxus 10 Gbit/s Fiber

My OTO socket is (unfortunately) located in the fuse and distribution box in my flat. There are only RJ45 sockets in the rooms, which have to be patched accordingly in the box. I would therefore have to place the Zyxel router in the fuse and distribution box. The WLAN signal would therefore probably be correspondingly weak. Is there also a kind of "WLAN box" for the router (as with the competition)? Or how do I solve this WLAN problem? Thank you in advance for your expertise and assessment.