@Inna401 I have never found a satisfactory way to send my guests any information with pictures using the AirBnB website or message platform.
Once my guest is booked, I have to use the professional tools and the alias address of my guest to send a detailed message to the guest with the PDF files that they need -- one being my rental agreement which is required by NC law and the other being our Welcome Package PDF which has a driving map, turn by turn directions and other access information that the guest will need.
I copy the alias address from the AirBnB website into my business email to send the (again, legally required) PDFs. I also send a message to the guest on the AirBnB platform telling them that I have sent the Welcome package from my business email and ask that they let me know that they received it.
I read somewhere recently that said that as of September 2023 the alias address via the professional tools will no longer be available -- I hope to *blank* that this is untrue, as I will have to leave AirBnB if I am unable to communicate with my guests and send them legally required documentation.