One review noted it as an "organized chaos"...this is spot on. I went around 12:30pm on a Sunday for reference.
Outside: We waited in the tent outside for roughly 30 minutes. You get a number when you first get in line with some rules outlined: $60 pre-tax max, 3 buckets max, 10 burgers max, 10 pies max. When you're close to the end of the line you get a copy of the menu. I'd highly recommend looking at the menu ahead of time so there isn't much delay. In line, a person with a notepad will mark your order down. After people file out, someone will let you know when you can enter the actual building.
Inside: Once you get inside it's not much more waiting. You hand the paper with your order to the cashier and they enter your order, you pay, and you get a buzzer. If you plan on sitting inside, look for a table as soon as you're allowed inside.
Food: The food was just like I remembered. I hadn't had Jollibee since 2016 and it was just as expected. One downside, this location doesn't have Halo-Halo.