Mqtt Mosquitto Broker missing

Hi There, this is my first topic, so please be patient.
I’ve using my home assistant about a half year now.
so far so good.
Now I integrated a Tasmota Gas-reader from Smartnetz.
This came with an automated script, to read all generated entities from the Tasmota.

After reading the Mqtt states with the explorer, i could see, that those variables received by ha.

now I setup another vm with home assistant, and just installed mosquito broker.
In the picture you see a Mosquitto broker device and the 8 entities.
Those are Missing in my main HA.

what is wrong. I don’t changed anything from September to now in my installation methods.

best regards
Andy

You have 2 HA now?

HA old has MQTT and 8 entity?

HA new VM has MQTT but no 8 entity?
This is likely because your device only connected to HA old mqtt.

HA old mqtt does not talk to HA new mqtt so it has no way to see device. If your plan is to turn off HA old then you should connect device to HA new mqtt. You may then tell ha old mqtt to listen to messages on HA new mqtt.

If you will keep both HA tell HA new mqtt to listen to HA old mqtt.

You have two MQTT brokers? If yes, then there’s your problem.