Large Nightime Nappies

Hey, I'm struggling to find a good nighttime Nappy for my LG - She's always been on the larger side so currently she's in size 7 Pampers Pants (for during the day) as they started leaking at night and I didn't want to go up to size 8 so soon, being the last and biggest size - 7 is absolutely fine throughout the day and never leaks. So I started looking at the nighttime pull ups. I tried Huggies daytime pull ups which worked okay for a bit but they started leaking and now I'm trying the Huggies drynites which again were great but have leaked last few nights 😩😩 I must add she's in the bigger sizes, age 4-7 as they match the weight range for the Pampers Size 7 I'm currently using and fit her well (my Daughter is quite tall as is easily mistaken for a 3-4yr old quite often). Also another thing, can't Potty train yet as she has a speech delay and we're having her assessed for autism so wouldn't be able to as she definitely wouldn't understand. Any recommendations would be appreciated 🫶🏻