Hi Claus,
You’d first have add the Broadlink device,
and then learn the commands from the original remote first, one by one.
After that you can use them in flows.
Note
Everything you programmed into the Broadlink phone app is completely separate from the Homey app. It doesn’t get synced or anything.
Advantage: the Homey app works completely local when you block broadlink DNS requests.
Please read RM4 instructions @ Broadlink app topic