I am having the same issue.
I use the key symbol for every guest and I have between 10-20 guests a week. I can’t live with out it. I know guests are given the link somewhere else but most people don’t see it and ask for the details. Send screen shots of the instructions is time consuming, unprofessional, and they arrive in the guests inbox in reverse!
I also launched a new apartment and therefore it means I have no old link to be able copy and send to guests.
It is extremely handy to have the link when guests and I don’t speak the same language.
When a guests receives the link with all the pictures it ensures they can get in the property. Which is so important when a place is a pretty tricky to find!
I also found that when creating the check in instructions the annotating pen and arrow feature isn’t working! That means the pictures are less useful. Arrows can tell the same instruction in every language! Left, right, straight, around the corner....
AirBnb please bring back the key symbol URGENTLY! And sort the annotating features!