Apple Business manager Application download issue

I realized that I can't install applications through a users that I create on Apple Business manager, I marked with a V all of the necessary privileges, and still once that I try to login with the content manager user to IOS device, I can perform the Login, but I can't download applications through the App store.

on some places its written that it's possible, and on some places it's not clear.

After I failed with that, I tried to understand how can I assign the apps that I "purchase" through the business manger to each user, but I can only assign it through locations and can't really see how I can assign it to users or even groups.

I would like to be able to create a user through the apple business store, that can access IOS devices and has the privileges to download applications, that I can manage it and reset it's password when necessary.

Any advice or did any of you saw a good applicable way to apply that?

do you have any idea why I can't download the apps through "content manager" user or why I can't ?

Do I need to use VPP maybe or is the only way is to use MDM such as JAMF, Khadi, or other MDM solutions?