OK, if you have the computer version, upload a recipe with your desired equipment profile to your cloud recipes.
Open the recipe on your app. Go down to where the equipment profile is. Open the profile. Go to the bottom of the profile. There should be an option to store to your profiles. Do so.
Now you can create recipes on the app using that profile. If you don't have the computer version, search the cloud for a recipe using the BeerSmith profike you want. Looks like you can't search on equipment type, so it'll be a bit of swiping. Save the recipe to your app, and do as above.
Not sure that's what you wanted.
Otherwise, you can just set the cube hops as s 20 minute steep addition, which of course you enter when you add or edit the hop addition.