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

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