The bug
You cannot (de-)select or reorder data and resource packs on the respective screens ("Create New World", "Options") using the keyboard. The entries can receive focus (see also MC-147837), but you cannot interact with them.
Expected would be that similar to the Multiplayer server list, pressing Shift + up/down arrow keys would allow reordering the entries and that there was a way to (de-)select them (i.e. move to "Selected" or "Available").
To reproduce
Open the resource packs menu
Press
Tabto focus a resource packTry to press any keys to move that resource pack to the "Selected" or "Available" ones
❌ You cannot move the resource pack
Linked issues
relates to 4
MC-146156
Cannot access scrollable button menus (such as video settings) using the keyboard only
Resolved
MC-206696
Cannot navigate in advancements using only keyboard
Open
MC-260920
Statistics screen columns are not accessible through keyboard navigation
Open
MC-187816
Using Tab multiple times to select a datapack / resource pack from the list does not deselect it
Resolved
Partially fixed as of 19w14b; you can highlight resource packs in the lists, however you still cannot move them over to the selected or available resource packs.