The most absorbent adult diaper for adults is the BetterDry Tab Style Adult Diapers.
The BetterDry Adult Plastic back diapers are the most absorbent adult diapers that I've found myself.
You can buy the BetterDry Adult diapers through Northshore.com at the link below.
https://www.northshorecare.com/adult-diapers/plastic-backed-adult-diapers/betterdry-tab-style-briefs
They are more expensive than other cheaper adult diapers but these work great.
I'm urinary incontinent and have to wear adult diapers because I have a complete loss of bladder control so I have to be in diapers 24 hours per day 7 days per week.
It's not so bad and much better than a catheter.
I've also used Attends adult diapers from healthykin and they were okay and are a good cheap diaper but the BetterDry adult diapers are the best for me.