I've put together a rough table showing some of the users and their areas of interest / specialist areas:
https://github.com/kata-containers/community/wiki/Areas-of-interest
This page could be useful for those raising PRs as they can look over the table and then add a few folk as explicit reviewers. It could also be useful for the weeks Kool Kats [1] to, again, manually add explicit reviewers for those PRs without much activity
If I've offended you by either missing you out mis-specifying your interests, I humbly apologise [2].
It's a first cut so there are bound to be mistakes - feel free to update it [3] :)
Cheers,
James.
[2] - If the spelling of that word offends you, I humbly apologize.