I would like to ask for support for React 18, as the alpha version was recently released: https://reactjs.org/blog/2021/06/08/the-plan-for-react-18.html

While this is an alpha release, my understanding is that this release is targeted towards library maintainers. The React team announced they're open for feedback:

We’ve published a React 18 Alpha so that library authors can try it and provide feedback.

I'm asking early, because it might be a good moment to start looking into React 18 adapter, and to try influence React in case there are major issues with onboarding Enzyme onto it.