What determines whether the sponsored "Things to do" carousel appears for a generic destination search?

Hi everyone,

I run a small business selling tickets for tourist attractions in a small seaside resort town in Poland (an optical illusions museum, a butterfly house and a boat cruise). We are considering Google’s Things to Do Ads, the sponsored “Tickets & tours” carousel with photos, prices and ratings shown above the regular results. Before we spend anything, I want to understand how it works.

What I see: searching for “things to do in Warsaw” shows the sponsored carousel at the top. The same kind of search for our town (“[town] attractions”) shows no carousel at all.

My questions:

  1. What determines whether the carousel is shown for a generic destination query? Is it a minimum number of bookable products, advertiser competition, search volume, or something else?
  2. Is a single ticket operator with 20-30 bookable products enough for the carousel to appear in a destination, or do several advertisers need to participate?
  3. Before any paid setup, is there a way to check or preview whether our tickets could appear in this carousel for our destination?

Thank you for any pointers!