Google announced that its PageSpeed Insights tool as of March 3, 2021 uses http/2 to make network requests, that is if the server supports it. If your site is on HTPT/2, you may see your PageSpeed Insights scores go up as a result.
No, your rankings won’t go up as a result but just a heads up.
Here is the announcement:
Note, GoogleBot supports crawling sites over HTTP/2 as well.
Forum discussion at Twitter.