In OBS we can add the chatrooms to the streaming services we are using.
open OBS and click on Docks/Custom browser docks
now add the following chat urls into the fields:
Mixcloud: https://www.mixcloud.com/live/frequencyradioonline/chat/
Combined chat : https://chat.restream.io/embed?token=8bb6603e-399a-4b59-86d1-01da284d2b00
(the combined chat merges messages from Facebook, Youtube and Twitch into one chat window)
Click Apply.
now you can slide the docks where ever you like in OBS.