I'm looking for a laptop (not a gaming laptop) for 700-800 euro to play planet coaster
Short info about Planet Coaster:
As soon as your park is sufficiently built up, a 2000 euro gaming PC will not help you anymore.
Then the game starts all by itself, very heavily.
Better build a PC. 1. Is a lot cheap 2. Laptop is not meant for gaming and it is also expensive if you want to buy a real gaming laptop.
Planet Coaster is a complex simulation, because you can't get around a gaming PC. It needs a strong processor, a lot of RAM and a solid graphics card, otherwise the game runs like a slideshow as soon as a few guests are in the park.
As an alternative I would recommend you Parkitect. That should still work on weaker PCs and laptops. A current Core i5 (8th or 9th generation) or Ryzen 5 should be enough.