16th note beaming options?

Is there a way to more comprehensively alter 16th note beaming patterns in 4/4? Looks like the notation beaming and grouping options mainly deal with 8th notes. This is Dorico’s default:
Screen Shot 2020-11-30 at 11.22.01 AM.png
and I would love for it to be this:
Screen Shot 2020-11-30 at 11.20.42 AM.png
while still maintaining this:
Screen Shot 2020-11-30 at 11.21.14 AM.png

Similarly, I’m seeing this in 12/8 time:
Screen Shot 2020-11-29 at 10.30.43 PM.png
and I would love the option to have those tied 16ths in beat 1 to be an 8th note automatically.

For 1, try entering the time signature as [1+1+1+1]/4.

For 2, I think you need to use Force Duration.