Going the the 'classism' post there is an AGEISM thing too. My oldest was born when I was a teen (barely a teen but yes a poor one at that and shock horror a single one after my bf left) and I got reported constantly for things that weren't even issue.
I had my second in my 20s and my 3rd in my 30s as a married woman living in the better side of town (got lucky finding a cheap house to rent here) and it was WILDLY different. Now if anything happens its laughed off as 'accidents will happen' or 'kids will be kids' etc... but as a teen mam EVERYTHING was directly my fault as a terrible mam.
My oldest has NEVER been ill or seriously injured in his life, never needed hospital etc... as I said no issues with nappy rash or anything. However if my oldest so much as fell over toddling and grazed his knee then health visitor or nursery would have to 'note it' as I was 'clearly neglectful and not keeping an eye on him'.
Yet in my 30s my younger kids fight and encourage each other to do stupid shit (if one told the other to jump of a bridge they would even question it, you can't trust them for even a second because they will push each other to out 'stupid' each other) and yet despite 4 hospital visits for injuries between them its now 'your clearly a good mum, these things just happen, its hard being a mam, don't worry about it, kids are a handful, your doing your best'.
I was reported to SS at least 5 different times for literal non issues (as an example one of the things I was report for was for 'not breastfeeding', my kid was happily fed and health just with formula). Due to the volume it was investigated though. SS where fine with my parenting and said my DS was clearly loved, healthy, had an abundance of stimulation and toys and was well looked after. They said it was a waste of their time but happens often.
I have never once had anyone even suggest reporting my younger kids or think to question my parenting and literally if anything I'm more relaxed and more laid back parent now on the third kid where as I was super protective and tried to do everything perfect with my PFB.
I have seen other teens go through the same thing, there is definitely an attitude some people have that punishes teens parents JUST for being teens not based on their actual parenting skills.