Create listing for specific CPT

I have created +10 CPT’s and they each have different custom fields.. Now when i want to direct my customer to create a new listing within a specific CPT. Can that only be achieved by the form that contains the dropdown when the customer/vendor is logged in?
Right now i use the shortcode for Add Listings, but i have to specify the specific CPT in the shortcode.. I want it to be dynamic so i dont have to also create +10 pages with same design, but different shortcode.

I want to create a pricelisting page with every CPT (prices could vary) in a dropdown or similar like this https://www.hitched.co.uk/suppliers/pricing.aspx.

How could that be achived?