Water contamination in the front differential

[1st7MT]

2025 7mt Badlands 10,000 miles. Decided to change all the driveline fluids and this is what came out of the front diff. Magnet had non concerning debris on it and the rest of the fluids were normal. Can't find any leaks but the drain and refill plugs were definitely not torqued properly almost hand tight. Breather is connected and intact. Truck has been off road 3 times and the deepest water its been in never even came close to the Breather. I replaced the fluid and plan on replacing it again in a week or two. I purchased a variable pressure smoke machine to be certain there are no leaks. What you guys think?

P.s I'm the first owner

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[ducksface]

Did it sit outside on a car lot prior to purchase?
Flooded lot=flooded diff.