Hong Kong Disney’s one-day ticket allows unlimited entry and exit to the park.
On the ticket day, there is unlimited entry and exit.

Absolutely no problem, just don’t lose the ticket.
Sure, just like Shanghai Disneyland.
May enter and exit multiple times, purchase a multi-day ticket
The day ticket allows unlimited entries.
The Hong Kong Disney one-day ticket allows for unlimited entry and exit to the park.
On the day of the ticket, entry and exit are unlimited.

Absolutely no problem, just don’t lose the ticket.
Alright, just like Shanghai Disneyland.
May enter and exit multiple times, require a multi-day ticket
The daily ticket allows unlimited entry.