react.dev/cookbook/cb-05-jsx-root-node-count tip.md

id	title	layout	permalink
jsx-root-node-count-tip	Maximum number of JSX root nodes	docs	jsx-root-node-count-tip.html

Currently, in a component's render, you can only return one node; if you have, say, a list of divs to return, you must wrap your components within a div, span or any other component.

Don't forget that JSX compiles into regular js; returning two functions doesn't really make syntactic sense.