Looker Studio data has disappeared

I've had many dashboards created in Looker Studio for a long time and I thought I made the switch correctly from UA to GA4 last year or so.  But today, July 1, there is no data showing now for our Looker Studio dashboards.  Anyone know how I need to fix this?  I did notice there isn't anything in the measurement ID section in the right column.  I'm logged into Looker Studio under File/Report Settings.  thx.

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I did look in the trash bin but restoring one of my dashboards there didn't bring back any data.