wifi speeds will be " UP TO" depending onm the channel you are on, based on interference from electrical devices, witring in walls, furnace, Air conditionner, vaccum being passed in a room.
grab your laptop connecti to your 5G wifi, anf run this applicassstion from the MS store. (if not win 10 then use your IOS or Android phone)
WiFi Analyzer :
https://www.microsoft.com/store/productId/9NBLGGH33N0N
make sure the default channel (likely 6) of your router is not in competition with other, when you look at the chart of channels if you see one empty, then switch the router WIFI channel (advanced functions of router) to another.... for example I use 9 because 4,5, and 6 are loaded with neighborhood wifi router's all stack over each other.. and yes this will cause a lower speed. (see arrow indicating where you would want to place your router channel to be at )
also check signal strength at the location where item will be used for same interferences (depending on location in house you could be closer to other routers on the same channel (any signal over -70db you can ignore) best range of power is under -40 to -30 db. then test your speed from location.
once tested with 5G then test again for 2.4G rinse and repate process for channel/interference/location.