XML File to Replace Sitemap

I run a website with c. 140,000 unique URLs. Wix’s URL limit for a sitemap is 10,000. I’ve created my own sitemap that contains 140,000 URLs locally but need to put that xml file under a URL onto my website to then submit it to Google Search Console.

My question is “is it possible to create a (hidden) page on my Wix site that can contain an XML file structure?” such that it can be submitted to Google Search Console to then be crawled