Welcome to the Spine forum!
Hmmm, your question may be too broad to answer well, but perhaps you may want to read the following book:
https://www.gameanim.com/book/
It mainly explains the animation of 3D characters, however, as far as I know, it is the most detailed book on game development workflow and what roles animators will be working with. This is well worth purchasing and reading even for 2D animators.
For free documentation, you may find "Get started with prototyping" on Unity Learn useful:
https://learn.unity.com/tutorial/get-started-with-prototyping?pathwayId=61a65568edbc2a00206076dd&missionId=61a617feedbc2a00253d67ee
The content assumes that you will be using Unity, so there may be a little extra knowledge mixed in if your project does not use Unity, but it will be helpful in terms of just how to plan when you start developing a game.
I hope these will help you.
