Yep, me too.
OP, my DD is in year 5 and I have had concerns about her writing (handwriting, hand pain, spelling, grammar, sentence structure) for the past few years. I mean, in one piece of recent work, her spellings include 'trd' for tried, 'boken' and 'bokon' for broken, 'wot' for what, 'brorer' for brother, 'awt' for out, 'garger' for garage, 'ficht' for fixed (but then spells fix right), both 'parens' and 'parns' for parents. (There are many more and it isn't that long a piece!)
I have raised it on several occasions with teachers and she's always been at 'expected' levels for writing; they put it down to rushing or "spelling not being the focus of that piece of work" or "she just needs to practice more", or "lots of them are struggling with that" or "we'll keep an eye on it".
My other concern is the huge disparity between her writing and her reading and general intelligence.
I have not pushed it recently with school as we have had other struggles (she's also AuDHD and has had EBSA), however in my appeal for a refusal to issue an EHCP, she's had a private EP assessment and this was one of the things he was concerned about and has looked into.
Haven't got the report yet, but I think it will come back saying there is a big gap between her knowledge and understanding and what she can express. He assessed both her reading comprehension (which he said was very advanced) and spelling (and I also sent him a few pieces of work). He said to her that writing must be very frustrating. I think it's possible he will conclude compensated dyslexia. Fair enough that the schools aren't EPs and can't look into every single child's profile in detail, but at least admit that they don't have the expertise rather than just assume they know everything and categorically deny there's a problem!
Sorry, a long-winded way of suggesting getting an EP assessment if possible!