ECS procedural world advice

Hello !

(First post here, i'll do my best)

I was going to build my first game with Unity, when i heard about ECS and DOTS.
I really like the type of code that ECS impose, and the performance improvement is very welcome ^^

Context :
My game will take place on little planets that are procedurally generated, from icosahedron.
I have hexagonal tiles that cover the surface of the planet, and from theses tiles :
- I build a big mesh.
- i compute neighboors
- i define an elevation, a temp etc

My question is : How can I model this world(planets/tiles) with the ecs workflow ?

Currently I'm using a game object, the planet, holding a collection of tiles that are simple C# classes, a colections of vector3 that are my vertices, and my tiles contains index to that collection.

I have no clue on how to represent that in ECS , event though i read the documentation twice.
I think I understood how ECS should work, but i can't apply it to what i have planned for my game

If someone can point me in the right direction

Thanks for this Awesome piece of software !