Domoticz

Currently I don't use Domoticz, but it looks as if it may solve a problem! Bear with me - I am new here!

I have an existing home automation system with ten RPis running Python programmes (plus a couple of Arduinos and Demos D1s) and all communicating using MQTT. They water the garden, switch on lights, monitor PIRs and switches, record the weather etc.
I have been using Blynk as a way to use a cloud service to connect my Android phone to a RPi "gateway" machine, that machine then publishes MQTT messages which are picked up by the appropriate machine.

My problem is that Blynk have updated their Python library and it will no longer co-exist with Paho-MQTT, so I am looking for an alternative.

Could I use the Domoticz Andoid App to give me an interface which is just "on-off" switches (I only need 6 or so).
Then have the Android App communicate with a cloud service which sends messages to the Donoticz server (note that I can't open any ports on my router - hence the need for a cloud service)
Then have the Domoticz server (on a RPi) publish MQ messages.

As you can see I probably want to use about 1% of the capability of Domoticz, but maybe it can solve a problem.

Hope someone can understand my request and give me a suggestion.
Thanks in advance
Bruce

Yep Domoticz is pretty much perfect for that.

https://www.domoticz.com/wiki/MyDomoticz

My system uses a lot of Node-Red, Zigbee2MQTT, some PHP and a tonn of bash scripts.

All ties back to Domoticz as the "user interface" for just controlling stuff and checking sensor readings + you get all the scripting capabilities of Domoticz which are definitely not to be underestimated, there are some pretty cool Lua scripts floating about.