I submitted this template
I have also mapped my TV remote to toggle it using an IR receiver I soldered onto a Sonoff 26 and put next to the TVs IR receiver. I use unused coloured buttons. The blue button for kettle, yellow for my lamp haha
To send TuyaSend4 102,0 via MQTT look into making a script and mapping to an entity button or automation.
For boiling the kettle before work, I have connected the kettle in HA to Google Home as a switch, then using assistant routines in the Google clock app, my work alarms will trigger the kettle. Makes it easy for me because I can change my alarm times depending on my variable shifts.