Hello.
I just created my studio with 7 pickaxes, then a product (free but with unlimited use), and invited a new user so I can test my studio as a user.
I got the email, but when I access the studio there is no pickaxe there. Totally empty. There is only the pricing page.
the dropdown menu on left is empty.
My pickaxes are unlisted or public.
I tried a product with locked pickaxes, unlocked.
I tried all that I could.
Please help me 
You have to add them
Found this solution. Hope it works for you. V2 is Unusable in current state, Pickaxes don't show in Studio - #2 by barbroos