they can be referred to as “the Americas” then i would deduct that all the objects within those Continents are also “American”
Unfortunately not though, because “American” is already used exclusively in reference to the USA. There is no adjective to refer to things from the Americas collectively. One of these two possible uses is extremely common and the other is extraordinarily rare. If you need the rare option, you need multiple words and can’t shorten it.
Apple offers to match donations from employees so this is a case of an employee making a small donation and Apple matching it rather than Apple explicitly choosing to make a tiny donation itself.