Complete List
Many of them seem to be undocumented and not listed in chrome://chrome-urls such as chrome://interstitials/ssl. You can find the complete list in the source code, under chrome/browser/ui/webui/chrome_url_data_manager_browsertest.cc. However, most of these are only enabled on some specific compilations of Chrome, such as Windows only, Linux only, or ChromeOS only specific builds.
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Complete List
Many of them seem to be undocumented and not listed in chrome://chrome-urls such as chrome://interstitials/ssl. You can find the complete list in the source code, under chrome/browser/ui/webui/chrome_url_data_manager_browsertest.cc. However, most of these are only enabled on some specific compilations of Chrome, such as Windows only, Linux only, or ChromeOS only specific builds.
You can also find clickable ones here: chrome://chrome-urls, whichever are available in your build. Not all seem to be there though.
There's also a separate For Debug category at the bottom which includes some URLs like chrome://kill. They can be found here in source code.
I know this might be stupid but are there other chrome urls than what are on the chrome:chrome-urls, because i recently discovered that you are able to go to the diagnostics app at chrome:diagnostics and its not on the list, if you have any other urls that would help