My internet service is 800 Mps. When I Speedtest my system having the computer hard wired I routinely acheive a speed of over 800Mps. But when I connect wirelessly to the system the speed drops to between 200 and 300 MPs.

checking the speed using the Deco  App I get speeds in the 775 range. Is there a reason for the difference ?  What steps can I implement to at least have the speeds be correct?

Thank you.