There's https://lemmy.world/legal for a variety of instance policy things, but it doesn't cover privacy and I don't believe there is an official statement on that.

Having one would be nice, but my sense from how admins handle transparency in general is that the privacy practices here are best-in-clasd compared to commercial social media giants. That's speculation of course, but semi informed by watching how the admins have handled a wide variety of issues.

Our privacy agreement is still being discussed and worked on, and we're hoping to put it up very soon! Thank you for your support and patience.