As HN: how to serve subdomain content in a subfolder?

At work we have the following situation: - we have several web applications hosted on various servers and end result is that they end up like this application1.root.com/page1 - this is bad for our SEO value/domain authority as Google will register the content of application1 to belong to a different domain domain than root.com - Ideally we would like to put it into a subfolder like this root.com/application1/page1

Cloudflare has a "Using Resolve Override in Page Rules" feature (https://support.cloudflare.com/hc/en-us/articles/206190798-Using-Resolve-Override-in-Page-Rules) that allows for it but its only available through the pricy enterprise solution.

Do you know of any other service that allows for this?