What can you substitute pink peppercorn with?

yes

"Although it is not a true pepper (Piper), its dried berries are often sold as pink peppercorns. The seeds can be used as a spice, if used in moderation, adding a pepper-like taste to food. They are...

it depends on what your cooking

Try white peppercorns, or if you cannot find them, ordinary black peppercorns.

You can eat "Schinus molle", berries of the California or Peruvian Peppertree. Also called: American pepper, Peruvian peppertree, escobilla, false pepper, molle del Peru, pepper tree,peppercorn tree,...