OP, it seems obvious that "new" MAF is the culprit here.
With your old MAF your fuel trims are almost perfect but with new one they're considereably off.
At 10-15% +/- fuel trim, the ECU will trigger CEL.

P.S.

I've had my AutoEnginuity Scan Tool since 2009 and it's excellent for reading short or long term fuel trims. Even 12 years later, I don't see any better scan tools in this price range, not to mention if they wuold last 12 years.

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2010 BMW M6 * Black Saphire Metallic * Full Black Merino Leather
2019 BMW X3 M40i * Alpine White * Mocha Leather