Grouping Collections - getting rid of the more groups, mobile view

Grouping collections in the new apps isn’t as friendly as the classic apps.
How can we get rid of the previous and more groups… we want to show the entire collection on the screen.

the only way possible until now and not really our ideal solution is to create custom collections based on the first row id of grouped items etc… but that’s not our best option in large apps + I couldn’t manage to remove the space between items of a custom collection

Any update on this? I also want to remove the “Show More Groups” / “Show Previous Groups”