Hi @Eric-and-Marlene0
As you know Airbnb holds all payments whether part payment or payment in full so the booking confirmation wouldn't show you whether a guest has paid in part or in full. I think anyone booking more than a month away is offered the part payment option. (Have a look at the Airbnb Help Centre for clarification).
Why not assume for the sake of ease, if it's within a month the guest has paid in full, if it's not they will have the option of party payment.
What it shows on your booking confirmation is what has been charged to the guest, airbnb fee and what you receive.