About HTTP/2 via from Google:
#HTTP/2 has no impact on SEO! Search engine crawlers (even if they don't support HTTP/2 yet, like Googlebot) will continue to work normally, you don't have to set up redirects, change links, add markup, or make any changes in Search Console.
# Most browsers only support #HTTP2 together with #HTTPS. That's when users will usually see improvements. Already on HTTPS? Awesome, you're all set.
# HTTP/2 is ready for use now, and supported in lots of website server setups.
Curious about more? Check out these links: