Project: QGIS
Version: 3.28
A new "Show in Attribute Table" action has been added to the right-click context menu of legend class symbols in the table of contents. This allows users to open the attribute table with a filter applied to match only the features relevant to a particular symbol group. This provides a significant performance improvement for certain datasets, such as large vector layers loaded from a remote source.
This feature was developed by Mathieu Pellerin