Passwords didn’t transfer to my new iPad
password manager didn’t transfer updated password to my new iPad
Ensure that you have enabled Keychain in iCloud on both the old and new iPad:
iPadOS15 and earlier:
Settings > [Your Name / AppleID] > iCloud > Keychain > iCloud Keychain - set to ON
iPadOS16:
Settings > [Your Name / AppleID] > iCloud > Passwords & Keychain > Sync this iPad - set to ON