It is like a concluding phrase, for example, "There you have it folks. The Patriots win the super bowl again" It is used in the summing up of an event. I don't hear it often and I think it was used a lot more with the previous generations.

Hi Yusuke, I notice you speak Japanese—in Japanese, I think "there you have it" is similar to 「ということですね」 Maybe that'll help! Adam

https://www.merriam-webster.com/dictionary/there%20you%20have%20it there you have it idiom Definition of there you have it —used to say that something has just been shown, described, or stated in a very clear and definite way. "You just plug it in, push this button, and there you have it.

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