@dalton1998 the issue with small flats like yours is likely to be interference from neighbours' wifi networks. In practice while there are 13 wifi channels in the 2.4GHz band only 3 or at most 4 networks can use them and avoid interference you are likelybtombe in range of many more. The faster 5GHz band has less range so is less affected but in a small flats that is likely to also be affected.
You can download an app clalled WiFi.analyzer which works on an Android phone or windows laptop which shows all of the WiFi signals in range with their strength and channel you maybe lucky and becablecto manuallyvfind tge least congested you can use but thst can change in hours..By far tge best solution is to use Ethernet cables especially if trying to work on a laptop, game on a console or streaming video. I know it sounds old fashioned but it works.
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
