Is there a list of the various LocalWhatever things? LocalContentColor, LocalTextStyle, LocalRippleTheme, LocalConfiguration, etc? Seems like there are quite a few of them, and I'm absently stumbling on them, but there's actually a bit of state to be accessed through the whole set me thinks.

There isn’t a list of all the composition locals. This would be hard to do since anyone can define a composition local. Even in compose itself, there are locals defined in many different modules.

Can they queried dynamically?

You can also open your IDE, navigate to

staticCompositionLocalOf

(or

compositionLocalOf

) and Cmd+Click on it. Should list all the available locals created by calling any of those functions. Not a curated list but might be good enough.