I have also confirmed this. Bee Tycoon Island Code: 3597-8094-4458.
The “Secondary Ability + ADS” mobile button does not show when holding the remote item. This buttons needs to show.
Also it would be nice if there was a secondary ability button that was not combined with the ADS button for people that do not want a combined button. The ADS & Throw Consumable buttons are still available even though you could just use the combined button.