@Mohd-Ali0 Hope you're keeping well. Here is my answer to your question:
Select Edit Listing go under Pricing tab, scroll down to Standard fees and charges hit Edit
you shall see an option named Extra Guests put the additional fee there and underneath fee, you shall be able to see For each guest after there select after how many guests you want to charge the Extra Guest Fee.
Hope this helps! Let me know if you need further assistance.