It does seem a little odd. 63 sounds like a lot but there are 6518 airports in the current cycle so that's less than 1%. I did post it on Navigraph's forum. I was looking at the Navigraph files for those airports in other products, like Aivlasoft's EFB and the AirbuX A320. The airport files were either empty or missing.
I went back to the PMDG set for EIWT and I copied the 3 approaches, VDMB, VDMC, and VDMD. I replaced the DM in the first three with 07 and in the second three with 25. Now the CDU shows 6 VOR approaches, 3 for each runway. So that would be a work-around for any airports that you want to use with the NGX.
LRW's post in ERR at DM LN was marked as the answer