An "unasked question" refers to a question that has not been asked or verbalized. It implies that there is a question someone is thinking about but has not expressed openly. Full definition
As a result, senior military leaders left unasked questions of fundamental importance. (goodreads.com)
A major piece of editing is pushing a writer to answer unasked questions and expound on lukewarm points / details. (wiseinkblog.com)
A Celebration of Sex After 50 answers specific, often unasked questions about sexual topics, presents detailed techniques and behavioral skills for deepening sexual pleasure and intimate companionship, and addresses other issues facing older couples including: (amazon.com)