It is already possible to enter username/password details for an existing site in WP Umbrella. But when adding a new site you cannot give these details. This way it is impossible to add an http auth protected website.

A workaround would be to remove the password en then add the site to WP Umbrella. And then enable the password again.

But with Flywheel I can create a staging server, but this staging is always password protected, I cannot remove this. So this workaround does not work.