As I have explained many times on here, once a statement is made it CAN NOT be withdrawn!
All you can do is to make another statement explaining why the first one was not correct. Both statements will be used as evidence if the case gets to court.
In domestic violence cases the policy of the CPS is that if there is sufficient evidence then the case always proceeds .
It does not matter if one party (or even both parties) want to withdraw statements. The case will proceed on other evidence.
In this case there will be medical evidence of the scald (burn) and of the injury to the woman's nose . The police ,ambulance and hospital staff will have given statements which will be used. Your daughter may possibly ( depends on her age) be asked for a statement, or can give video evidence/statement.
The phone call to the police and ambulance will have been recorded and will be used as evidence.
To sum up there is plenty of evidence to take the case to court, as this is common assault there is almost no chance of a jail sentence so you will just have to wait and see what happens.
I just need to remind you that a guilty plea at the first opportunity will mean that any sentence you get will be reduced by 1/3rd.
This includes community service and fines, as I have already said a jail term is not a realistic possibility in this case.