Persimmon

Yes, this can be accomplished.

First your location.

And then the mdl number of your HP.

Size of your home?

You will need the best matching evap coil for your application along with a correctly sized furnace. Since you already have AmStd HP, I recommend you stay with this brand.

And finally, you will probably need new Dual Fuel thermostat with an outdoor sensor.

I do suggest a good box filter cabinet if you don't have one already.

IMO

Do you have NG? Propane is about electric costs in much of the country so there is no financial advantage.

Usually if NG is available, it is used so I am guessing it is not available.