Is there a way to update PHP within HTML without having to reload the page?

Question

Is there a way to update PHP within HTML without having to reload the HTML page? I have a page that shows the response time of an API but so that the response time can be updated frequently I use the HTML code:

< meta http-equiv="refresh" content="10;url=index.php" />

Is there any way to do this in php ? if you don’t understand the site https://steamgaug.es/ does exactly what I’m trying to explain

PS - I don’t know if this site uses PHP.