Connecting Two TP-Link TL-WR841N Routers to Create Single Wi-Fi Network

I would like to connect two routers to each other so that they form one Wi-Fi network.
I looked at various guides and most talked about how to set up two routers, but each always created two separate Wi-Fi networks. Routers are connected via a LAN cable. Routers are: tp-link TL-WR841N.
Please help .

Set AP mode on both routers.
On one of the APs, disable the DHCP server or make sure that the server address pools do not match.
Use the same name (SSID) and the same authentication for both WIFI networks.
Set different channels on which WIFI will be broadcast from the AP.

I think it's impossible.
In my opinion, it's best to configure one router: wifi AP, WAN, DHCP, MAC filtering and what else you need there, and to increase the range of your network, you only configure the WiFi router on the second router other than on the first router, ignore its WAN settings, you set the LAN address in the same address space as on the first router and twisted pair you connect one of its outputs with one of the outputs of the first router (cable between two outputs).

E.g. the first LAN router 192.168.1.1
Secondary LAN router 192.168.1.2

Wireless devices will switch themselves between wifi networks depending on the signal strength, while in each device regardless of the connected all the others will be available.

Do as dedito writes. Be sure to manually set the same security methods, preferably WPA2 PSK AES.
With this configuration, roaming takes several hundred milliseconds, so switching between APs is virtually unnoticeable.

The best option was to do what dedito wrote. after some hour of struggling with the settings (I am a layman) I managed to configure everything and everything flashes as it should, I consider the topic closed.