You will find some advice in these discussions:

https://www.researchgate.net/post/Review_article_writing/1

https://www.researchgate.net/post/What_are_the_most_important_elements_to_consider_in_writing_a_review_article/1

https://www.researchgate.net/post/What_items_should_I_consider_in_writing_an_effective_review_article/1

https://www.researchgate.net/post/What_are_the_lower_and_upper_limits_about_the_number_of_references_in_Review_Articles_Is_there_any_protocol_for_that/1

https://www.researchgate.net/post/What_is_the_minimum_number_of_papers_for_a_review_article/1

https://www.researchgate.net/post/How_many_papers_should_be_reviewed_before_writing_a_review_article/1

https://www.researchgate.net/post/What_points_are_to_be_remembered_while_writing_a_review_article/1

https://www.researchgate.net/post/How_do_I_write_a_review_article/1

https://www.researchgate.net/post/Any_prescribed_standard_format_for_writting_review_articles/1

https://www.researchgate.net/post/What-about-the-novilty-in-writing-a-review-article/1

https://www.researchgate.net/post/How-do-you-write-a-good-review-paper/1

https://www.researchgate.net/post/How_do_you_write_a_good_review_paper2/1

https://www.researchgate.net/post/Review_article_vs_research_article_Could_you_please_guide/1

https://www.researchgate.net/post/Where_to_start_a_review_paper_writing/1

https://www.researchgate.net/post/Why_is_it_important_to_write_a_review_paper/1