I work on a financial product where we need to document all of work which is later shared to regulators, meaning it needs to have a very high quality. I have 5 years experience from finance but I never needed to write a document that is shared with external regulators.
The whole team are currently working in a shared document and the manager/PO assigns tickets what we need to do with a extremely short description like "Document this step", "Document this code" etc.
Multiple times I have done my tickets and market them as done and noticed later on that the manager has either edited my part heavily or rewritten everything is his own words, often much more detailed. He has never informed me of this, but instead I had to discover it myself, which frustrates me as he is making the chances behind my back.
I agree that his edits are much better than mine, but I am never given a chance to make the changes myself. I have even asked him to review my work before submission without any feedback. For example, I asked him to review "Document this step" before submitting the first version of the document, I never received any feedback, 2 months later we are working on the second version and he decided to rewrite everything about "Document this step".
Now in my last performance review he has mentioned that my documentation is off poor quality and not up to standards. I totally agree that I could improve it, but never given any chance. How should I approach this?