You can look around on websites such as
https://dailydiapers.com/board fetlife and even
https://adisc.org and you may find an ABDL caretaker to treat you as a toddler full time.
I haven't found anyone yet though to treat me as a toddler however I wouldn't want it to be full time because I do enjoy some things about being an adult and wouldn't want to give them up.
I just want someone to take care of me on some days and treat me as a toddler, change my diaper, make my food, change my clothes etc.
However I want to be able to be an adult when I choose too.
Even though I love playing as a toddler boy at home sometimes I eventually get bored of it.
I tried being a toddler for a full month before when I was temporarily unemployed and at the end of the month I got bored and wanted to be an adult again.