Most daycare centers will help with the potty training once the parents begin the potty training at home.
However most daycare centers will require the child to wear diapers or pull ups to daycare until they are at least dry for 1 week to 1 month.
The actual rules can vary from daycare to daycare.
At a daycare I used to work at the child had to have wear diapers and not pull ups until they could keep the diaper dry for at least 2 weeks.
If the diaper could be kept dry for at least 2 weeks then they could come in underwear.
If they wet the diaper then they would need to be wear diapers again until a few more weeks passed and they were dry.
Or if the child came in underwear and wet or pooped their underwear a few times in a day then back in diapers they would be.
Daycare centers will not do all the potty training because that is the parents job.
But if they are actively potty training at home the daycare center will help.