Great!
1. I assume that is mobile Safari or Chrome on IOS? On IOS devices (especially with Safari) the scroll behavior is determined by the browser itself, and it can’t be overwritten. If you check it on any android or desktop device it will be shown. Some IOS system setting hides it by default, although I am not sore if it’s changeable in the most recent releases.
You can increase the max-height property to avoid the scroll altogether though.
2. Sort of yes, you can changet the display/filter mode for each taxonomy via these settings: https://i.imgur.com/PRoVNgp.png
