Case insensitive URL permutations all served as 200 instead canonical redirect

My setup

• WordPress 6.1.1 (current)
• Redirection 5.3.6 (current)
• Apache Web Server
• Default .htaccess in WordPress root directory
• WordPress > Tool > Redirection > Options > Default URL settings > Case insensitive matches: Can be ON and OFF.

Regardless whether ON or OFF, the following happens:

• /test-page/ is the real slug
• /Test-page/ gets served as 200 with the same content
• /TEst-page/ gets served as 200 with the same content
• /TESt-page/ gets served as 200 with the same content

Maybe WordPress core handles this meanwhile and bypasses your plugin? Or the webserver does something?

I appreciate that the correct URL in the wrong capitalization leads not to a 404 error and hence user frustration, regardless whether WP core or redirection plugins ensures this. But instead of 200 it should be a redirection (HTTP 3xx class).

If the slug has capitalization on purpose, e.g. /Test-Page/ then requesting /TEST-Page/ should redirect to /Test-Page/ to guarantee canonical links.

Thanks for any help.