The browser used by win11 is Edge, and IE browser is no longer used, but most small websites still use IE, or use a lower version of the insecure TLS protocol. At this time, Edge browser cannot be used to access.
Edge browser uses IE compatibility mode
Open Edge Settings -> Default Browser:
It is also possible to display IE mode on the toolbar, in the customize toolbar of the appearance:
Site uses expired or insecure TLS security settings
Select Advanced in Internet Options and select all 'Use TLS1.0', 'Use TLS1.1', 'Use TLS1.2'
