I can only speak for PS4 but if you're playing on a single player world (specifically Ragnarok in my case) and you have the bug where wyverns aren't spawning or the nests aren't spawning, use " admincheat destroywilddinos " and wait about 1 in game day, maybe 2, then check they wyverns to see if they spawned and if the nests spawned, worked for me.
PS. If you play single player, you should probably just host a non dedicated server and put a lock on it. In my experience I've never really had problems like they wyverns not spawning or their nests not spawning.
Hope this helped, it could work for Xbox too, idk if PC has the same problem but if you're experiencing this glitch then try this out. up this so it can hopefully help people with this glitch!
There are more than one type of wyvern, they are fire, poison, lightning, and soon to be a Crystal Wyvern with the Crystal Isles free DLC coming, they are going to be a passive tame. The types of Crystal Wyverns are base, tropical, blood, and ember.
The wyverns spawn in wyvern dens, and can be found in the Highlands for Ragnarok and the Snow Desert in Valguero (I only do free DLCs).
You tame wuverns by going into the wyvern dens and finding nests with eggs in them. Once you have an egg, they need 10-15 standing torches, 4-5 fireplaces, or 20 (atleast) campfires. Until they are adults, they need Wyvern Milk to survive. That is all they eat until then.
Wyvern milk can be obtained by knocking out a female wyvern and collecting milk from there. Alpha wyverns drop more than normal wyverns.
Wyverns pick up larger dinos than other flyers.
Wyverns can breathe fire for fire wyvern, lightning for lighting wyvern, and poison balls for poison wyvern.