MQTT Light Transition Support

The request itself is simple (the code part of it, not so sure): it would be awesome if I could transition my MQTT light from one brightness to another.
Currently, transition is not supported, and the MQTT light jumps from one value to the next. It would be amazing if it could be a smooth transition.

Does this problem further exist?
Only Z-Wave is mentioned in the lights component page to not support the transition feature. But I also doesn’t get my MQTT Light to transition to another brightness. Support for MQTT would be really nice.

I also would like to have transition between different brightness when manually using the front end