Few things seem to have changed, I created my MSFS '20 profile based on this one (changed graphics and I didn't use all of it since I have a hardware G1000 set):
StreamDeck XL Profile for Cessna C-172 G1000 Version for Microsoft Flight Simulator | MSFS
These are the controls I haven't gotten working, it seems you need to use IE: variables instead of using the toggle KVars for some of these but I have no idea how to do that in AAO:
Fuel pump (writing to kvar ELECT_FUEL_PUMP1_SET still seems to work but the a: variable that I used to read its state (GENERAL ENG FUEL PUMP SWITCH:1) no longer works
Master alternator (IE:ELECTRICAL_ALTERNATOR_1)
Master battery (IE:ELECTRICAL_BATTERY_1)
Standby battery (IE:ELECTRICAL_BATTERY_STBY_2)
Avionics bus 1 (IE:ELECTRICAL_LINE_BUS_1_TO_AVIONICS_BUS_1)
Avionics bus 2 (IE:ELECTRICAL_LINE_BUS_1_TO_AVIONICS_BUS_2)
Fuel selector (left/both/right) (IE:FUEL_SELECTOR_1)