In the UK we even have protected and quite difficult to achieve things like 'chartered engineer' which similar to 'chartered accountant' etc originates from royal charter but it carries with it ethical and legal implications etc. You need a STEM degree and 6 years relevant professional experience before you can even consider applying lol. I am not chartered but have worked with many CEng engineers.
It is easily the weirdest thing about HN that Americans seem to equate writing code/handling infrastructure to designing eg Superyachts or Peristaltic pumps - 2 things I've done as an 'engineer'!