The phrase "a wide array of matters" is correct and usable in written English.
It can be used when referring to a diverse range of topics or issues.
Example: "The conference will cover a wide array of matters, including climate change, economic policy, and social justice."
Alternatives: "a broad range of issues" or "a diverse set of topics."
Both men worked in the Office of Legal Counsel, which provides the executive branch with binding legal interpretations on a wide array of matters; both played key roles in crafting or signing off on the so-called torture memos.
It touches on a wide array of matters, including the president's business dealings with Russia, the firing of James B. Comey as FBI director and hush payments made to women who say they had affairs with Trump.
The ideological leaning of the court could be pivotal in determining the outcome of a wide array of matters including the death penalty, abortion, gun control, environmental regulations, voting rights, immigration, religious liberty, presidential powers and others.
The inspector general's office, which is independent of the LAPD, monitors a wide array of matters, including complaints against officers, department practices, and shootings and other serious force used by police.
There also is a two-year ban on switching sides on a wider array of matters that were in the employee's official purview.
She helped to develop the Textiles and Clothing Department so that it encompassed a wide array of subject matter, by increasing the curriculum from three courses to over twenty-five.
I won't identify the blog or the writer, other than to say that this particular blog posts on a wide array of subject matter.
The earliest Duke-issued cards covered a wide array of subject matter with series titled Actors and Actresses, Fishers and Fish, Jokes, Ocean and River Steamers, and even Scenes of Perilous Occupations.
Her lyrics have referenced a wide array of subject matter, often relatively obscure, as in G. I. Gurdjieff in the song "Them Heavy People", while "Deeper Understanding", from The Sensual World, portrays a person who stays indoors, obsessively talking to a computer and shunning human contact.
Mr. Gore has played a more prominent role than any other vice president in memory on a wide array of regulatory matters.
The entertainment programs awarded Peabodys this year are an eclectic lot, but the Peabody Awards have always rewarded a wide array of "stories that matter".
