Alias subdirectory as a subdomain on root domain

I have the following structure:

example.com (Root), app.example.com (actual application)

Users can access their profile as: app.example.com/view/username for example

Is there a way I can show the content of app.example.com/view/username in username.example.com directly?

I tried creating a wildcard subdomain but it doesn’t seem to work as right now I have 2 htaccess files (one for example.com and the other for app.example.com).

Thanks in advance!

Edit:

File structure is Angular’s (it has Routing already) so it doesn’t make a difference

OS: CentOS 7, using Apache