Thank you for your feedback. For now, you can use an API through Powershell to import .mpp files in Project for the web. You can learn more here: https://techcommunity.microsoft.com/t5/project-blog/import-project-desktop-files-to-project-for-the-web-api/ba-p/2031298
We are also looking into other ways to support import. Stay tuned for future updates.
An error occurred while saving the commentLiz commented
I'm quite upset as I spent an entire 2 days creating my gantt chart from home on project plan 1 and now have no way to share it with my colleagues or integrate with either planner or teams except through a clunky website port.
The project being planned was for our department's migration to teams as well - this is my first impression outside of Word/Excel/PPT/Outlook. Unbelievably disappointed with this amount of wasted work.