Is this possible in Dorico yet?

This single stave example requires multiple, hidden time signatures. Is this possible?

Yes, absolutely - since Dorico v1.0

Basically use the Properties panel:

Thanks!

actually Jeffhrsn, you don’t even need to think about time signatures here: just input the notes, then select a note and click onto the barline panel to add the appropriate barline. Alternatively use the Popover method…

Haha! Thanks, k_b! Brilliant! So used to the garbage that is Finale that it didn’t even occur to me that this was possible even tho I’ve seen Daniel demo just entering in notes with a time signature. Yay!