It’s very unfriendly currently to unsuspend cards from pre-made decks on mobile, as you have to manually type in the tag.
A way to select cards hierarchically on mobile, such as you can on the Desktop version with the Add On (example), would be extremely appreciated; as that would mean I could simply take my iPad with me on trips, instead of the laptop.
I hope you’re having a nice day! 
On AnkiMobile if you tap the Filter button, you can type a few characters to quickly narrow down the list of tags to the one you want. If you’re asking about AnkiDroid, suggestions are better posted on AnkiDroid’s forum.
I also would like if some way to just view the tags in a hierarchical view was possible. All my notes are ordered by number so it would be easier to view in numerical order.
Eventually I’d like to implement a sidebar like in the computer version