I think it’s sadly virtually meaningless. With a few days (I had some time off work and I have a somewhat addictive personality so I spent a few days “full time” = 7+ hours per day of chess puzzles) and with a good deal of mental effort I got to 2000 rating on puzzles, yet if I play someone rated 700 it’s 50/50 if I win or lose. I am rated 7 hundred something on 10 minute games and 3-4 hundred on fast games - rubbish! Yet I can reliably do puzzles to hand around the 1700-2000 mark
Imho puzzles train you to be crafty and take advantage of a situation plus they train you to recognise a few very specific situation as easy mates. But they don’t help you with openings or “real” game situations. Unfortunately for me!
I think if you can get to 2000 puzzle rating that means you are a good average chess player. I got up to 2200 puzzle the other day which I am very proud of. I even gave myself a pat on the back & told myself well done.