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.
Doomer perspective: It wouldn’t be alien at all. It’d be rocks. Literal, honest to goodness rocks. I could go out to my driveway and pick up a few of them right now.
Optimistic perspective: The tech is a do-what-I-mean machine and can do basically anything and everything, or else is capable of upgrading the user to achieve their fullest potential.
Combo perspective (told through ancient memes): 1) Any sufficiently advanced technology is indistinguishable from magic. 2) Power corrupts. Absolute power corrupts absolutely. 3) Do not meddle in the affairs of wizards, for they are subtle and quick to anger.