there is (plenty|) more where that came from

more of the thing in question is available or can be provided

The idiom "there is more where that came from" is rooted in the idea that a particular resource or supply is not limited to what has already been used or consumed. This phrase is used to convey the idea that there is a sufficient or ample supply of something beyond what has already been used, seen, or experienced. It can be used in various contexts, such as offering more of a particular item or indicating that additional opportunities, resources, or benefits are available.

He shared a plate of cookies and said, 'Help yourself; there's more where that came from.
The manager praised her performance and promised, 'If you need more challenges, there's plenty more where that came from.
After donating to the charity, they assured her, 'Thank you for your contribution, and remember, there's plenty more where that came from.
She provided a sample of her artwork and said, 'If you like this, there's more where that came from in my portfolio.
The coach encouraged the team by saying, 'You played well today, and there's plenty more where that came from in future games.