If you have individual accounts then don’t hide your wealth from each other as this will cause tension in the family. Be sure to discuss your preferences and air out your concerns about the same.
When you share a life together you naturally share your wealth, so why would you not be willing to share a bank account?
Maybe one person is better at managing money than the other, it could be possible that one one should hold the ‘main’ account for the bills and the other should have their own account separate. Whatever your preferences or reasons, talk it out.