I have held off sending queries during COVID-19 lockdown, hoping that the fall might bring the industry back to a more normal flow of manuscripts and that agents might be feeling more acquisitive than they are just now. In the meantime, a book with the same title as mine has been published and is now on the bestseller list. Both works are fiction but in very different genres. My title is a term of art in a particular industry, and the best-selling title is a plain English use of the same words.
I know there is no copyright issue, but I don't want to appear ignorant of the market. Must I find another title before I query?
Titles change often 'twixt query/agent/submission/sale/publication.
I just went through this with one of my clients, and I liked the original title a lot!
But the marketing folks and the publicity folks generally know their stuff, and a savvy editor knows when to listen to them, so change we did.
And sometimes two books get published with the same title as well.
My favorite example of this is Just As I Am, which was both the memoir of Rev. Billy Graham and, a delicious steamy romantic novel by E. Lynn Harris.
Take the title off your list of things to fret over.