It’s typical for most screens, but how bad the backlight bleed is is variable. Yours looks pretty significant.
I returned a MacBook Pro 16 over this. Had a difficult time as well. My iMac has virtually no backlight bleed. MacBook Pro 13 has a few spots.
I’ll be checking for this on all new products from now on - live and learn I guess. The marketing would have one believe these panels are perfect - I’ve yet to see an ad where an iMac is displaying a dark image and there’s backlight in the ad to manage expectations.
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I doubt it’ll be easy to get this replaced, but you might get lucky with an understanding representative.