By definition, all thunderstorms contain lightning because it takes the intense heat of a lightning strike to create thunder. In fact, the increase of lightning is one tool used to indicate a strengthening storm, and storms frequently generate a lot of lightning shortly before tornado formation.
Thunder is caused by the sudden heating of the air as lightning passes through. How hot does a lightning bolt get?...find out at https://ksstorm.info/prepare-2022-latest-lightning-safety-data/