Hey @takkme ! There's actually a really simple fix. Your components won't show up unless you manually check the Show on Mobile option in the inspector. The way to do it is to scroll all the way down to Appearance, then click on the settings button and you'll see that option (See screenshot)
You just need to make sure to do that for any component you want to show up on your mobile layout. Or if you're looking for a more native option, you can try to use Retool Mobile.