Thanks to the work of Rob Clark and others primarily at Google, the Freedreno open-source Qualcomm Adreno driver that started out as a reverse-engineering ambition has continued advancing well. The latest milestone achieved is this open-source Gallium3D driver now able to advertise OpenGL 4.6 for the A6xx series graphics.
Two remaining extensions were needed to cross OpenGL 4.6 off the to-do list with GL_ARB_pipeline_statistics_query and GL_ARB_transform_feedback_overflow_query. This merge request took care of the last bits and OpenGL 4.6 is now exposed by Freedreno.
A nice milestone unlocked for open-source Adreno graphics and this ability will be found with the Mesa 23.2 release due out as stable around August~September.