All is not lost just yet, although he answered your question accurately, your indirect question is, “can I use my xNT with my lock”
The answer to that is MAYBE
As it is your lock, you may be able to ENROLL it.
ENROLLING may be possible, COPYING you can’t do.
So really it will depend on the lock.
What lock is it?
Is it listed on the Matrix
If not or the answer is inconclusive, your best bet is to get an NTAG216 card, and see if you can enroll that, if so, then you will just need to see if you can get the lock and xNT to couple.
(you could try directly with the xNT, but I wouldnt persist too long if it doesn’t work with the first couple of tries.)