Some people have to work shifts to make ends meet. There's no childcare available that you can apply for help with. So ideally, childcare that is outside of the typical 8-6 schedule.
Secondly, you have to accept that the people struggling the most to find work are single parents seeking menial work because they aren't qualified to do anything else. They don't get employed because 18 year olds are much, much cheaper, rarely less reliable (due to child sickness) and just as capable of working a till or loading a dishwasher. Yes, of course employers aren't allowed to ask if you have kids, but they do anyway. Most people applying for menial work don't know their employment rights - knowing your employment rights is very offputting to employers.
So there needs to be something in it for the employer. There needs to be a reason to employ a parent as opposed to a cheaper, similarly competent teenager. Until you can sell us to employers, they won't buy.