I would not be overly concerned at this point, there are only a few showing in the photo, and the fact that they are non ferrous in nature says that it is not critical at this time.
Would suggest the following: Add a magnetic drain plug. After about 500-750 miles, change the filter again to see if you are getting more/less/none. Based upon what the intermediate filter check shows, keep an eye on it to see what, if anything, changes or develops.
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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