Iris 1.4 is now available for download for 1.16.5, 1.18.2, and 1.19.2, adding many OptiFine parity features as well as new features for shader developers.
This release also includes a few bug fixes and DSA support for performance improvements.
⬇ Download the release here: https://irisshaders.net/download.html
A more detailed changelog is available for those interested: https://github.com/IrisShaders/Iris/blob/trunk/docs/changelogs/1.4.0/full.md