Windows 10 S mode is designed for security and performance. This mode enables your computer to run faster and offers consistent performance. But, the disadvantage of Windows S mode is, you cannot install applications that are not available on the Microsoft Store. For example, you cannot install and use Chrome. The default browser will be Edge, and Bing will be the default search engine. Disabling Windows 10 S mode is one-way; you cannot enable it later. The step-by-step guidelines for Windows 10 S mode disable without Microsoft account are given on this page.
Source: https://howtosetup.co/windows-10-s-mode-disable-without-microsoft-account/