Hi James, welcome to planDisney!
When the
Disneyland Resort re-opened, a
theme park reservation system was implemented, requiring Guests to have both a theme park reservation and a valid
theme park ticket to enter the parks. Each ticket needs its own reservation, so you would not be able to add additional tickets to the reservation you have booked for your current ticket. However, I do have good news! I just checked the
Theme Park Reservation Availability Calendar and the month of July 2022 shows full availability for both
Disneyland Park and
Disney California Adventure Park for the park hopper tickets. So, you should be able to purchase an additional park hopper ticket and secure a reservation for your current arrival date.
If your question was more about upgrading a one park per day ticket to a park hopper ticket, that can be done at the Disneyland Resort Main Entrance Ticket Booths. The amazing Cast Members can certainly help you make the upgrade, and it will not impact your current reservation at all. Just let them know you have a reservation booked, and you should be good to go!
I hope you're excited for your trip that's just around the corner! Many experiences have returned to the Disneyland Resort, and I'm sure you're going to have a great time! The traditional character meet and greets are back, which means Mickey and all his Pals are ready to give out the best hugs and sign your autograph books. And many of the fantastic nighttime experiences are back as well! The Main Street Electrical Parade, Disneyland Forever fireworks, World of Color, and my personal favorite, Fantasmic! have all returned!
See ya real soon!
Jin