Data access after Project Online (PWA) retirement

Thanks, John,
I watched the thread you pointed to (great overview).
We also published a video covering the retirement topic (for context: https://youtu.be/R4gtv-RgR9g - the video is in Portuguese, but it can be auto-captioned in English).
My question here is narrower and more practical: what exactly happens to the data after the Project Online (PWA) retirement date?

• Will the data currently in Project Online remain accessible (even read-only) after retirement, and for how long?
  
  
• Will tenants still be able to view/export/migrate their data after the date? If yes, what’s the time window and supported mechanisms (e.g., OData/reporting DB, CSOM/REST, etc.)?
  
  
• Regarding the SharePoint project sites linked to PWA, will they remain available (and editable) as standard SharePoint sites? For how long and under what constraints?
  
  
• Is there an official Microsoft guidance or policy page that states data accessibility/retention timelines to help customers plan migration and compliance?
  
  If you (or someone from Microsoft) can share the official documentation or a definitive statement on post-retirement data access and retention, that would be extremely helpful for customers planning migrations and audits. Thanks in advance!