UE powered app and user content

Hello, friends!

I am new to UE, but have some JS knowledge and think, that logic of this process is very simple, but have no idea how to implement it in UE.
Can we have home screen with authorization, login and see only user-specific levels, that available for download and/or be updatable from web server?
Can we have that on android and ios platforms too?

You can, but it is relatively advanced functionality.

It is like DLC or like advanced level streaming?
I saw a few threads and documentation pages about DLC, but I did not find anything similar to the my task…

It is whatever you want it to be, as you will have to do a lot of custom C++.

Yeah, you’d have to do a lot of coding to create your own user system

I have seen several PHP based registration/login blueprints and they seem easy.
But, as you say, I can not use this as service, and provide user-specific links to levels and then run it, am i right?