Here is the model info https://www.tp-link.com/uk/download/Archer-VR2600.html#video Dropping of WIFI but not LAN can be caused by several things. Pleas give us more info. What do you do to...

Are you on the latest firmware? https://www.tp-link.com/us/download/Archer-C5400_V1.html#Firmware

The manual shows how to upgrade the firmware. https://static.tp-link.com/res/down/doc/Archer_C2(US)_V1_UG.pdf

Your devices may be the limiting factor. Remember for WIFI, 2.4 ghz is slower than 5 ghz.

Consider using a good UPS with voltage control for your modem and router as that may be the issue. Interference with other devices may also be an issue.

It is recommended that you get separate Modem and Router instead of the Gateway Combo model as they tend to have more issues and harder to debug if you have issues later. Many people have specific...