Stating the obvious, you could assign 6->31, 1->1 and skip around in between, and then you have a “6 speed” emulation for your fan. But I guess that’s what you mean by less than “fully integrated”.
We have not added more than 9 speeds in the app because with all those individual buttons, the control experience drops off. That said, in the V2 Bond Home app we intend to have a slider option for speed control, which would make this doable.
You could program the extra speeds over the Local API and then use them with some 3-rd party integration, but again, that’s not the experience you should expect.