Good URL's dropped to zero for Mobile Experience

Hi guys,

In June of this year, our website page experience on mobile tanked. GSC is still saying there is no issues, but clearly something is amiss;



I presume it was to do with the CWV update, but was happy to let it run and hoped it was resolving itself mid-June.

Anyone any suggestions or information that might help?

Check with the mobile usability report in the GSC The top-level view shows all pages with more than a threshold level of mobile usability issues and the information about how to fix it, and a process to notify Google about your fixes