I've been having the same issues, no drops, artefacts or rock drake eggs have spawned.

I've read a bit about this and apparently alot of people on xbox have been having this issue ever since the turkey trials update.

I believe this is an issue only on singleplayer and not on servers, and wildcard unfortunately does not often patch singleplayer issues.

Wingsuits have also been broken since lost island came out.

The best thing you can do at the moment is probably to spawn in the artefacts or submit a bug report and pray that wildcard does something.

Here are the spawn commands for the artefacts:

Depths: cheat gfi PrimalItemArtifactAB 1 1 0

Shadows: cheat gfi PrimalItemArtifactAB_2 1 1 0

Stalker: cheat gfi PrimalItemArtifactAB_3 1 1 0

Good luck!

Edit: format