Private iOS Distribution?

I am building an internal company app that is restricted with a login screen and only intended for employees.

Once I signup for an Apple Developer account, can I publish an app and keep it out of the App Store?

There is an Apple feature called Business Manager and I believe a few apps have successfully been published through this.

I’d be interested to know if anyone has done this with an Adalo app?

That looks like a platform to manage corporate Apple devices and control what apps are loaded on them.

In my scenario, all of the iPhones and apple accounts will be each employees personal account. I just need a way to share a link with them to install the iOS app without it being public in the apple App Store.

I haven’t setup a developer account yet. I am stuck on the D-U-N-S requirement at the moment.