The option to list or unlist is no longer editable in Airbnb:
If you wish to list or unlist, you will need to do it directly in the Hostaway dashboard by going to 'Channel manager' followed by 'Listing Mapping' and then 'Settings' in front of the listing you wish to list or unlist:
You can then select the option 'Is listed in Airbnb' (under Airbnb Pro) and it will automatically update in Airbnb.
Additional note: the Airbnb snooze feature is currently not available in the new Airbnb Pro API.