kimco:
No it is not! Its like saying, how do you prove pain without technical test. This is a silly comparison. Everyone alive has reported as having dreamt at least ones. Same as having felt pain...not everyone can claim to have visited the supernatural so you drawing the parallel argument is just poor from you.

Anyways

https://www.google.com/amp/s/www.livescience.com/amp/58646-brain-waves-dreaming.html

This might help. Scientific knowledge and tools will continue to improve.

Lol, you're straddling between "non technical" and technical proofs to get something for the dreams. All still depending on the individual's testimony, which you refuse to take in for the supernatural.
Imagine if we all based our lives on scientific tools and dismissed dreams since scientists didn't have proofs? Who will answer and who will apologize when they improve enough to prove it? Science has proven to be unreliable naive and without apology for its ignorance. All we hear after all the years of arrogance is that science will continue to improve. Sorry, billions of people are going into eternity and can't wait for science to prove the supernatural before they act on it. You may.