Any alien civilisation, unless it's within our very solar system and we've failed to detect it which seems thoroughly unlikely, has visited us from another star system. If not FTL, they have the means to travel across light years of distance and are capable of preserving themselves for the trip if it's a long one and folding space if it's a "short" trip. That kind of technology to do either is still beyond us despite all the advancements we've made in the last 100 years

I would posit it's not even Victorian era scientists looking at an iPad. It's like presenting an iPad to pre-agriculture humans. We might not even fathom how it works or what it's even supposed to do when our frame of reference is so far behind technologically