Here is the recently updated QML quick reference for the latest Qt 6.2.1 release.
You can complete the form to be emailed with a printable Adobe Acrobat (PDF) versions in US Letter and A4 paper sizes. The reference does not cover all the QML modules, as the goal was to fit it all on one double-sided page. It does cover the most common QML modules, the basic QML syntax and types, command line options for the QML-related tools and QML environment variables.