Are there laptops that are suitable for developing applications?

I don't want to create a high-end game now, but with Unity ect every now and then. Playing around.

You can actually use any better gaming laptop (> 1500 euro) to work with Unity or otherwise develop software.

Especially in the direction of mobile or low poly style games you won't have any problems.

Of course, high-end graphics don't work that well, that's not what the laptop is made for.