This version of Simple Durability Tooltip supports Minecraft >=1.21, as 1.21 refactored internal parts of tooltips that broke the previous version.
Simple Durability Tooltip now supports both Fabric and Quilt! Quilt for Minecraft versions >=1.18.2, and Fabric for Minecraft versions >=1.14.
(Should also work on the snapshots in-between. Feel free to create an issue if a version doesn't work within those bounds.)
Initial release