Add a Slug to dropdown menu

I’ve created a multi-region site with the multisite feature on WordPress, and have created a dropdown menu for the multi-site. My question is: is it possible to create a dropdown menu that can add a slug dynamically for each page on my website?

For Example:

• My current page is www.mywebsite.com/about-us (this is the main site);
• and I want to change it to my second site by clicking the dropdown menu. And the URL will become: www.mywebsite.com/europe/about-us;
• Also I want it can be implemented into my blog post as well. For example, from www.mywebsite.com/blog/2020/11/lorem-ipsum to www.mywebsite.com/europe/blog/2020/11/lorem-ipsum

if it’s possible, do you guys know how to do that?

Thanks.