Reinforcement learning is part of ML and I know ML is a good topic here. However, I know there is a data science and a computer science site (and maths etc). I was wondering, where would a reinforcement learning question be better to ask?
Reinforcement learning is on-topic here, and I hope our ML side grows as much as possible, so I hope you will ask it here. However, you should consider the nature of the RL topic about which you want to ask. For example, if you wanted to ask about the mathematical analysis of various (asymptotics and such), you may prefer to ask on math.SE, etc.