So I normally use the below as quick reference guide: https://mar.codes/apple-colors
however, what is the reason that iOS colors are not available on tvOS? Especially the system/grays that are available on iOS.
What does everyone else use for alternatives to these to get close matches between their multi platform apps?
The adaptable gray colors are only supported on iOS, iPadOS, visionOS and Mac Catalyst. If you'd like us to consider adding the API functionality to tvOS, please file an enhancement request using Feedback Assistant. Once you file the request, please post the FB number here. If you're not familiar with how to file enhancement requests, take a look at Bug Reporting: How and Why?