Link between Dimmer and switch - Tasmota

I have this dimmer: AVATTO Tuya Led Touch Wifi Dimmer Light Switch, Smart Strip Bulb Dimmer Switch with APP, Voice Remote for Alexa, Google Home|Home Automation Modules| - AliExpress
When pressed off, it does not turn off a relay, but lowers the brightness to 0, and then sets as power=off.

I want to connect another switch that can turn the dimmer on and off (NOT dimming the light) and be sync.

I tried to do this with automation and node-RED but encountered the following issues:

  1. The switch takes 3 seconds (when it is at a brightness of 100) until it turns off.
    I tried to do a delay, but it does cause problems and he sometimes gets dizzy.
  2. I tried to set as a group in Tasmota, but it does not give me (maybe because I gave each device a fixed IP?)

Anyone have an idea? Thanks in advance