What does SVB mean for my Vanguard-managed 401k (if anything)?

I’ve read a lot about this but I don’t think I know enough about finances to really digest what I’m reading lol. I think I understand that Vanguard was a prominent shareholder and those shares are kinda just… gone now, but I don’t know how much of my retirement, if any, depended on SVB.

I also don’t know how to find that out, so here I am, at your mercy