Today I learned (TIL) that you can reference regex groups in the "Find and Replace" search of VSCode.
For example, if you want to find a certain HTML tag to replace it with a different one, you could use the following regex expression in the search
<p>([.\W\w]*?)</p>
and use the captured group $1
in the replacement like this:
<h1>$1</h1>
Ensure that you enabled regex syntax using the button in the search field on the right side.