As in, you have what is considered “alien” technology that’s 100,000 years newer than anything invented or available today. By then, most humans around today are deceased before that’s even invented due to it being beyond our own lifetime. First, it would be studied if anything of that sort is available now or an equivalent but nothing comes close. People may ask questions as to how you acquired such advanced tech.
Governments may force you to mass produce that against your will if the demand is high, but again comes with its own issues: the materials it’s produced from are beyond what we already acknowledge (not yet known until later) but, they may just coerce you to extract such materials and resources. The futuristic technology will look nothing that’s depicted in science fiction, since it’s something we don’t even understand yet.
100 milenia, that’s long enough to forget everything, start over a bunch on times and still go much beyond we have.
Depending on what it is its unusual properties could go completely unnoticed or hidden for decades and then we might not have the technology to properly analyse it for a few more decades. Think an unbreakable string or a flashlight that apparently never runs out of batteries.