Wifi 5-7 happened, now operating at 3 different frequency ranges (2.4, 5 and 6Ghz) and using techniques like beam forming and MIMO. All those antennas need to go somewhere.

If you want plain unassuming looking hardware get dedicated wifi access points and place them all over the building. There are plenty of those shaped liked big smoke detectors.

If you want single device there are also quite a few trash can shaped home routers.