In the UK a community midwife visits all mums for 10 days post partum.
They check on the babe to make sure their umbilicus is healthy looking, that you are well if you have stitches or an incision wound. They weigh the LO and help with feeding.
They just pop in for as long as you want them for each day so that you aren't checked out of hospital and abandoned to your fate.
A friend of mine was glad of the midwife who insisted on having a look at her stitches when my friend looked unwell and a bit feverish when she visited. Her stitches were infected and she got that fixes quickly. If she had been home alone with no visit she would have let that go on for longer and the problem would have got much worse.
All sorts of things can happen post partum and if you aren't online or have friends to ask or others to support you it is a difficult time to be alone. Lots of people don't know that falling to pieces on days 3 and 4 and weeping is absolutely normal and will pass. A midwife can reassure you that it is and it doesn't mean you are a bad mum.
You can ask them about any problems you are having or anything you aren't sure about. In most places you will have met the community midwifery team during your pregnancy and may even have birthed with one of them so having them come to see you post partum is a continuation of the same care.
I didn't need help from them by the time I had my third but they came to see dd as I had had a difficult labour and they wanted to see how we were - and snuggle her to welcome her! With my fourth they came for the same reason and to watch us EC