May I suggest @Elliana0 , @David595 , and @Jim-And-Nancy1 , that you set up access to the photos you use in your check in instructions. This can include Google road directions from an airport or landmark. Screen shot the wording etc if you want.
I used the key icon for sending check in instructions, but as a precaution, I’ve also always send the photo images that related to the specific guests needs - staying, “ just in case you do not receive this from Airbnb! .......”
That way I have covered any glitches they may be happening in the system at the time, for it’s happened before.
Generally I work off an iPad, so I have a “Airbnb Check In” folder in photos, that is very easily accessed. I also send it ahead of time if a guest is travelling a long haul flight, with the recommendation that they save the images for easy access, in case they switch off global roaming, or do not have immediate access to an Australian SIM card.
It’s certainly worth thinking about for your back up plan.