Looking to connect 2 webflow projects with reverse proxy

Hi I am looking to connect 2 webflow projects together since one of the sites requires more than 100 pages. I’ve seen that it might require reverse proxy. I’m not entirely experienced with this does anyone have any resources or can point me in the right direction as to how to go about this? What sorts of things do I need to gather in order to go about this since this is for a client?

Here is my site Read-Only: LINK
(how to share your site Read-Only link)