Hello @chamster,
Thanks for reaching out to us!
I’ve performed some cross-testing on my local site with the latest versions of WordPress 5.9.3, WooCommerce 6.5.1, and our free Storefront theme. No other plugin is enabled.
When doing so I’ve not been able to replicate the behavior you describe with the WooCommerce Home page ([my-web-site-.com]/wp-admin/admin.php?page=wc-admin) displaying a 404 error.
It could be code from another plugin or a theme on your site which is causing this behavior.
You can test if that’s the case on your site by disabling all other plugins aside from WooCommerce along with switching to a theme like Storefront.
Once you have disabled all other plugins and switched the theme if the behavior is resolved you can then enable your theme first and each plugin testing after each one is enabled until the behavior returns to locate the culprit.
You can find a more detailed explanation on how to do a conflict test here: https://docs.woocommerce.com/document/how-to-test-for-conflicts/.
Let us know how it goes.