How to check our 1 page internal links in same domain ?

In the Links section of Google Search Console, you can find Internal Links with the details you require.

If you want to locate all internal links on a particular page of your website, Ahrefs Webmaster Tool can assist. Enter your website's URL in Site Explorer and access the "Internal Backlinks" section, which will help you identify a comprehensive list of internal backlinks connected to the chosen page.

To check the internal links on a specific page within the same domain, you can utilize various online tools designed for SEO analysis. One approach is to use a website crawler or SEO auditing tool. Input the URL of the page you want to analyze, and these tools will crawl your website, identifying and listing all internal links present on that particular page. Google Search Console is another valuable resource where you can inspect the URL and see the number of internal links pointing to it. Additionally, manually reviewing the page's source code can reveal the anchor tags used for internal linking. By combining these methods, you can comprehensively assess the internal linking structure of your chosen page within the same domain.