So - my key is uploaded to keys.openpgp.org via the web interface. It says all email addresses on the active 5 UIDs are verified and that there exists a 6th revoked UID (this is all correct).
The key has two notations on uid 1:
Notations: proof@ariadne.id=@mastodon.social/@chrissearle
proof@ariadne.id=https://gist.github.com/chrissearle/06acfec29d1997ecc5b35024f052c7b4
But - when I hit https://keyoxide.org/116FBA8295065A01C3BC7CC6CF79BF54D4BF0A41 - it just says "No public keys could be found"
The doc that is linked has two parts - HKP and WKD - but - the error doesn't include which one.
Unsure how to find out what's wrong here.