@game You can start by looking at our benchmarks page - they should be useful enough to give you a starting point for things like requests per second per CPU core, or CCU per CPU core.
Afterwards you can begin planning your own benchmarks. We always recommend you benchmark specifically for the combination of requests and overall shape of traffic you expect your real game client to produce. This is a good way to estimate hardware requirements as it is tailored to your exact use case more than any synthetic benchmark could be.
You can also get in touch with us to arrange a technical call, this type of analysis and planning is definitely something we can help with.