I don’t think a baby shower wish list is cheeky at all.
When pregnant with my first the cheapest thing cost £5 and the most expensive thing cost £500😂 with my son, I had more experience and knew exactly what I needed so the list ranged from £1.75 up to £45.
Not everyone is willing (or able to) spend so much on items but there are some people that are. My Godfather bought my £200 cot from my list which was super helpful. I just put everything I needed on my list so whoever would buy something would be making my to do list much shorter!
I do think asking someone to go halves on something with someone else is ridiculous. If someone can’t or doesn’t want to buy something on your list then they absolutely don’t need too. I do think some people rely on these lists for people to buy essentials because they’re not in a financial position to do so themselves even though it’s their child!