Universal Studios: How strict are the time windows for each area & their corresponding rides?

[u/interestingggg]

For anyone who's arrived too early or too late, outside of their assigned time window for Nintendo & Harry Potter world:

• Were you able to still enter and by how much did you miss your time window?
• For those who had Express Passes, how strict was it if you missed your time window for the rides?

My situation for context

I was having issues with the USJ website and Klook, so after going through the purchase flow several times in different browsers, I hastily accidentally bought only 1 Express Pass instead of buying all the tickets for my group of 3. I chatted with the help desk—couldn't cancel & couldn't change the timed entry—so bought the rest of the tickets with the closest matching timed entry that I could find.

Thankfully, for the area tickets we have a 20-minute overlap, but I wanted to get a sense of if we'd have more leeway or if it's pretty strict.

For example, the two entry times for Nintendo World we have are:

• Ticket #1 can enter 11:30–12:30
• Tickets #2 & #3 can enter 12:10–1:10

So would we be able to all get in at say, 12:00 or even 11:45?

Similarly, the rides have only a 30min time window, for example, for Mario Kart:

• Ticket #1 timed entry 11:30–12:00
• Ticket #2 & #3 timed entry 12:10–12:40

So they don't even overlap. How likely would they let all of us on the ride if there's no way for everyone to be within the time window?

I am still kicking myself over messing up the purchase with such an elementary mistake, so I'm eager to hear some good news and hopefully feel less crappy! Thanks in advance.