Yes, AI tools that focus on automation and analysis, rather than creating new content, may be used for supporting tasks e.g., to check for spelling and grammatical errors, and improve the clarity and consistency of prose.
However, submitting assessed work created by writing assistants such as GrammarlyGO is prohibited, because these tools go beyond simple grammar checks and can rewrite sentences or even generate full paragraphs.
You are responsible for maintaining the integrity of the content of your submitted work which should reflect your original thinking.