The source of my American investment immigrant assets is bank loans, is that ok?

If it is a mortgage loan, it is theoretically possible.

But the best house has been purchased for more than 5 years, and the source of funds is easy to prove.

But to be honest, those who prove the source of funds through mortgage and salary are generally "poor" and need to borrow enough money (more than investment) to apply for approval.

And immigrants from China, 18 years old, to answer your question.