MQTT over WebSocket

[obtuse dune]

how can i add the mqtt integration? the dialog asks for a direct connection to port 1883, which is not available. Only websocket is possible, but the dialog doesn't seem to offer any configuration. The documentation https://www.home-assistant.io/integrations/mqtt/#using-websockets-as-transport assumes that the integration has already been added before configuring websocket.

i found out that the options get visible by

1. enabling advanced mode in the user profile
2. enabling advanced mode in the mqtt integration dialog

however, it still can't connect while the same settings work fine in MQTTX or MQTT Explorer 🙁

seems "Broker certificate validation" needs to be set to "Auto" to enable TLS