There's also a central human DNA database, run by the scientific community. It's a very, very important tool for research. The database software is kinda special, since a DNA lookup isn't like finding a number in the Yellow Pages book. Ot involves one gigantic field (the actual DNA data) with just a few other ordinary fields per line.
Microsoft is one of the names supplying the money and Apple is a minority share holder of the Malayan company that developed the database engine. The developer is a strange figure. Enough for a spicy conspiracy theory.
Still, I don't think your or my DNA is of any interest to any of them. There's no real life identities in this DNA database. I'm sure some databases on the input side will contain some identities, but these are much smaller and very fragmented. In this case, the money isn't in the identities, but in the research potential of the DNA data. And that's what everybody seems to be doing. Apple for it's skin DNA reader, fi.
I see no reason to fear large scale misuse in this case.
It is possible, however. There was a wild story a while back about the Chinese collecting DNA data from dissidents (most notably Uyghur) and targeting their relatives through it.