[kroeckx]

0-RTT / early data is supported. It is mentioned in the blog.

The wiki is really a document about issues you might run into when upgrading, and 0-RTT is not such a problem. To enable 0-RTT you need to use new functions.

[tialaramex]

Thanks, I would never have discovered this from their blog post but you are correct that the new functions exist and are documented here:

https://www.openssl.org/docs/man1.1.1/man3/SSL_allow_early_d...