Language issues-dd's teacher seeking help

[JimmyJam2019]

Hi
My 5yo (summer born) DD has been progressing ok at school this term (y1), about a half term behind in reading, handwriting a little rough but maths OK. Nothing to worry about given younger in year and covid but teacher is concerned about her use of language.
She speaks well and has excellent vocabulary for age, keen to learn. No issues with social skills but when presented with a situation she hasn't created, she doesn't appear to know what to say (eg they were talking about differences between weather here and in Antarctica as a topic, the teacher took then to the window but dd was unable to describe the frosty day with blue sky and sunshine).
In written work, she is unable to use the word banks to create simple sentences, usually just copying out the words given. With support she can perhaps come up with something relevant but can't write the words.
Teacher is concerned by this and has asked our permission to work with senco and possibly an external consultant on figuring out how to support her.
Any ideas what, if anything, this is?

If that's the only issue presenting then it's really hard to say. My ds is autistic and really struggles with describing. His vocabulary is vast but how he uses it is different to non autistic people. He does a lot of parroting back and quoting from tv, books etc. He can talk a lot about things that interest him but does not engage in things that don't. He has a lot of stock phrases he says that he has learnt are appropriate responses . But he also has social issues, eye contact, stims such as head shaking etc meltdowns, needs routines, preparation. He becomes obsessed with things. Does your dd have any other issues that concern you? What's her imagination like? Anyway it's really positive teacher is on the ball and looking at best way to support your child. Hopefully they will get to bottom of it, it could be as simple as some work done to help her develop her imagination/descriptive skills. If it is something more significant then they should pick up on it.