Boris Mann 5th September 2022 at 3:52pm
Generally speaking, most recipes include some proportion of the following ingredients: bay leaves, chilies, cloves, cinnamon stick, ginger, allspice, mustard seed, coriander, black pepper, mace, and cardamom.
The article also has links to a handful of specific recipes.
Link: https://awaytogarden.com/whats-in-pickling-spice-some-recipes/