Yes. And Photoshop. And Adobe XD. I just checked and they still made those available this year too. I’m guessing Apple probably made previous libraries available for Figma too but I can’t say that for sure.

I don’t believe so—I distinctly remember searching their site last month for an official Figma UI kit, and they only had Sketch and Adobe.

The iOS 17 assets for Figma are new. Which, whew, thank you, Apple.

The linked Figma resources in the OP still aren’t available on https://developer.apple.com/design/resources/

Where have they made these resources available in the past?

I was under the impression that the 3rd party projects were so popular because of a lack of such resources from Apple.

Is it just that the Figma-native assets are new?

Yes, they have had these assets available for 5+ years https://developer.apple.com/design/resources/

Figma is new.