Dear Jing,
Please confirm if the date code for the marking QEN2112T is Year 2021 and Week 12?
1st line: MK10DN512VLQ10
2nd line: 5N22D
3rd line: QEN2112T
Please refer to link for the similar info: https://community.nxp.com/t5/Kinetis-Microcontrollers/package-marking/m-p/735688#M44916