Subitems drop down list on phone application

using subitems for tracking manufacturing is great, but on phone is useless due to the need to get into the subitem page, go back to the item pack and select another subitems. on PC we can just simply click on the drop down list, remain on the same page and we can scroll through the items.

can we get the phone application to have the ability to open the drop down list of subitems as part of the current page instead of moving to a whole new page that I need to get out off. also if I want to see the subitems of two main items and compare them, I can open the items on PC and compare, while on phone we cannot do that due to inability to open two subitems at the same time.