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I’m not showing that the subdomain, links.xsenny.dev has been assigned to the site. You can follow this Netlify doc for assigning custom domains to a production site. I believe this is why you’re seeing the Site Not Found from your second screenshot.
In addition, I see you have a Netlify DNS zone setup for xsenny.dev, however currently, the name servers are pointing to Cloudflare instead of the Netlify name servers mentioned here:
Follow this Support Guide for fixing inactive DNS Zones: