Effective date of the new one-size screenshot requirement?

It was great to hear in the WWDC video about whats new in appstoreconnect about the new feature of only needing to upload one screen size for screenshots.

Is there any way to get any sort of estimate about when this will appear?

even just a general idea of hours, days, weeks, or months would be helpful and save us from needlessly making unnecessary screenshots

Even if thats not available yet, thanks so much for at least making this change.

Effective date of the new one-size screenshot requirement?
 
 
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