Although it is a comfortable pattern to define click handlers explicitly, in this case these are a bit unnecessary. Feel free to use the useState callbacks, such as setCurrentQty directly within anonymous functions in your JSX. In the current setup, it is adding additional lines of code without much benefit.
A bit of an opinion, but:
https://github.com/ptrollins/project-greenfield/blob/80ceadcdf6ab89155872f650c2bb3e16b47251f4/client/src/components/product/overview/styles/Styles.jsx#L67-L81
Although it is a comfortable pattern to define click handlers explicitly, in this case these are a bit unnecessary. Feel free to use the useState callbacks, such as
setCurrentQty
directly within anonymous functions in your JSX. In the current setup, it is adding additional lines of code without much benefit.