Create a sensor entity in the update domain

Is there any way to create a binary sensor in the update domain, like update.my_sensor_name?
I tried template sensors and Node Red generated sensors, but I only achieve to create binary_sensor.my_sensor_name.

Were you able to create it?

Use case: I have a HAOS installation on Proxmox. I have different LXCs for other components (mqtt, zigbee2mqtt, zwavejs, nodered, mariadb, …) instead of using addons. I would like to create update sensors to know if there is a pending update for those components.

Before moving to proxmox and using docker on a RPI4, I was using What’s up docker to monitor those components and WUD was able to create the update sensors.