Please contact me on discord whenever you are online so we can return the dinos to you, i will also need the names of the dinos and the level they were roughly around.
After double checking the shop buys for the artifacts, they do all in fact give everything you need for the boss, please double check your inventory to see if they stacked with other things~ Danke :)
Did you check to see if your character wasn't still on Vaguero?
Edit: from what it looks like you didn't even succeed in transferring thus your character will be on Valgeuro still.
You can also try to freeze them with owls, and pick them up with other dinos (i'm not sure the second one will work), a tribe mate of mine has had this similar issue before, its pretty common and wont cause issues with the server.
I am very sorry to hear this, but admins are here to help you replace stuff due to bugs in the game.
There is a clear warning while flying close to the border as well as red markers, in this case we cannot replace your items.
I went to your base made the "Soul Finder" and was able to pull well over 12 baby dinos to my inventory, i made a new soul terminal and labeled it Found Babies for your retreival
Edit: for future MIA dinos please make a soul finder in your basic inventory and search your dinos
Sometimes when transferring large amounts of dinos, the inventory will bug and not show anything, try transferring all out and see if you receive any of them.
If they are still missing please reply to this~