[997_986]

We don't know the year of manufacture or the mileage, but in principle it doesn't matter.
Open the oil filter and cut the filter open or inspect it thoroughly. The filter housing holds exactly 0.4 litres of oil if the filter has become saturated. If the finding is also confirmed in the filter, I would not drive another metre and consider a revision.
Brown particles come from the rails of the camshaft chains.

Just my 5ct

Edit: I have to correct myself, I wouldn't drive another metre now or even start it. Do an oil analysis.