Google misleads restaurant customers with a big blue “Order Online” button

From what I understand the restaurant listed themselves on Google's platform with contact information, and a link to their own ordering website, or a way to call for a meal pickup. Google inserted an indirection where the orders get placed via a third-party thus bypassing the restaurant without informing the restaurant.

If the restaurant gets a lead via a delivery-app, they they pay a fee to the delivery app. Here they would have gotten an organic "free" lead, that was then converted into a paid lead because Google inserted a delivery-app between the user and the restaurant. And Google probably earns some coin along with the delivery app.

Seems like Google wants to put a toll booth to monetize the action behind every search result. If I search for a toy and then buy a toy from a website, then Google wants money because they provided a "lead".

How did Google bring them more orders? Perhaps people search for the restaurant by name and this button shows up?