Firstly, you are missing the f from function.
As mentioned in your previous post…
I have a number of filters that get all populated using unique values from a collection…
https://www.wix.com/corvid/forum/community-discussion/create-a-function-that-populates-a-dropdown-with-unique-values-from-a-collection-with-both-numbers-of-strings
You should have a look at using a onAfterQuery hook and combining all the values into one.
https://www.wix.com/corvid/reference/wix-data.Hooks.html#afterQuery
https://support.wix.com/en/article/corvid-about-data-hooks
There are previous forum posts that can help with this too.
https://www.wix.com/corvid/forum/community-discussion/afterquery-data-hook-not-firing
https://www.wix.com/corvid/forum/community-discussion/combining-data-of-several-fields-into-one-for-multiple-search-boxes