Soaking through diaper at night

My son is almost 2 1/2, and most nights now he is soaking through his diaper. This has been going on for a while now and we’ve tried changing his diapers to huggies overnites, which worked for a little bit. But he’s been increasingly soaking through them, and this past week he soaked through them almost every night. And it’s not just a simple leak. This kid pees A TON even during the day and his diaper is massively full by morning.

I’m not sure what to do. He’s not potty trained yet although we were planning on starting soon. Should I try a different diaper brand at night? Nothing to drink after dinner? Try to get him to go in the toilet before bed even though we haven’t started potty training? Just change his diaper in the night? I’m open to suggestions at this point. I’m tired of washing sheets and pajamas daily haha.