[Solved] Tasmota with 433 Mhz RF switch - how to synchronise 1-gang to stairs over RF?

Colleagues,

I have acquired a couple of these (appearance slightly different), but same module:
Link to this switch - Smatrul 1 Gang RF No Neutral Switch

These switches also have operation via RF 433MHz and this works without any problem with both Tasmota and the RF 433 remote control with which you can switch the light on/off.

I would like, to apply such 2 switches to the stairs (without the need to communicate via MQTT), so that one is paired with the other and when one is switched on, that via RF it also sends the switch-on command to the other. While I manage to pair the switches with the remote control without any problems, I do not manage to pair them with each other.

Do you have any ideas and experience on how to do this without using an MQTT server or some RF bridge? On popular auction sites they sell other models with the master/slave designation, but they are completely different in design from what I have and I would like to adopt the ones I have purchased for the stairs.

Help pliz?
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Is your goal here to use RF, or is it to pair the two switches?

Two switches with Tasmota (or OBK) uploaded can be paired without MQTT via Tasmota Device Groups. The communication of these groups is via WiFi itself, more precisely via broadcast UDP.
Tasmota Device Groups - connection of OpenBeken (BK7231T/BK7231N) to Tasmota .

@p.kaczmarek2 - ooooo great! thank you very much.

Although I would prefer via RF, so that it would be more reliable and work in case of disconnection of the router, therefore more willingly after RF, but if there is no way out then it can also be over WiFi.

A RF is also possible?

I have not yet come across a device of this type capable of transmitting codes, but Tasmota has an RFsend command:
https://tasmota.github.io/docs/RF-Transceiver

Many thanks for your help Mr @p.kaczmarek2 !

Colleagues have guided me on the subject and hinted at a solution via MQTT