Download DreamboxEDIT or E-Channelizer. Connect to the receiver via FTP by entering the IP, root login and password (empty by default or specified in the firmware).
Use the "Import M3U" function and turn the playlist into a bouquet. Link EPG ID via XMLTV import or built-in directories.
Send the changes back to the receiver and restart the GUI (Menu → Standby/Restart → Restart GUI). If the stream does not start, make sure that gstreamer is updated and the exteplayer3 package for HLS is installed.