But your answer is more detailed, so outdone again!
roon is a media_player and again there is not a mqtt media integration natively in home assistant.
There may be a custom component to get an mqtt media player, in fact I am pretty sure I have seen one in the forum somewhere. Search may be your best option, or alternatively suggest what ever enhancements you want in the roon integration.
For others with similar problem: If you have a Tasmota device, make sure to SetOption19 1 to make Tasmota respond to discovery attempts of the MQTT integration. See Home Assistant - Tasmota
FYI Your advice will be ineffective in the very near future.
Several versions ago, the Tasmota project deprecated support for Home Assistant’s MQTT Discovery in favor of their own method. That’s why SetOption19 0 is the default setting. All of the code for supporting Home Assistant’s MQTT Discovery will be removed from the compiled release version in the near future (thereby rendering SetOption19 1 inoperative unless one compiles a custom version that includes the additional code).
It’s advisable for users to adopt Tasmota’s discovery method which is supported by Home Assistant by simply installing the Tasmota integration.
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