Hi jun yamada,
① Is there something wrong with using LPC-LINK2 to write and ship with the CMSIS-DAP interface? (Are there any conditions such as unavailability for mass production?
Answer: You can use the LPC-LINK2 to program your MKM14Z64CHH5, but I suggest you use the LPC-LINK2 with the JLINK firmware.
You can use the LPCScrypt to change the LPC-LINK2 firmware, which can be download from this link:
LPCScrypt v2.0.0|NXP

② If there is a problem, is there any writer recommended by NXP?
Answer: LPC-LINK2 with JLINK can debug your chip, it's no problem.
About the other programmer or debugger, you can use: Segger JLINK, P&E Multilink, both these debugger can be used on your side.
Wish it helps you!
If you still have question about it, please kindly let me know.
Have a great day,
Kerry
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