Some pianist, like Rafał Blechacz are rather liberal at the hand shape, they seemingly don't maintain deliberately a specific hand shape, but some pianist, like Yundi Li, seemingly always keep their hands in a rather round curve.
Shape of hand doesn't matter really. You can go check my site https://onepianotutor.blogspot.com I have lots of experience with Chopin and if you want you can contact me. Prices are affordable!
Just as a matter of interest, were you planning to include that link in your 3rd post as well?Generally, we don't try to sell each other services on here and whilst you no doubt have some ability, we have pianists and teachers on here with years of experience that give their time and advice for nothing.Advertising is actually against the forum rules and to me personally is even less acceptable as you appear to have joined today.Welcome, but i would ask you to read the rules.