Nests and eggs don’t spawn in your wyvern trench?

Do this to make them spawn:

Kill some wyverns, then do other things across the map for 30 Minutes.

Go back on a fast flyer, now you should see some new wyverns but no nests and eggs.

Go back to your Base and spent another hour doing something

Look for Wyverns again, now there should be 5 or 8 and no nests.

Hide near Wyverns for 20 Minutes (don’t get killed) and all the nests are spawned. :)

I hope i could help, otherwise use spawn commands.