Hi [NAME]  welcome to this free user to user Alienware laptop discussion forum. This is not Dell Support. Support for Dell G15 5510 Drivers & Downloads includes the Ubuntu 20.04 LTS operating system. Dell provides the minimum support for Ubuntu, which allows the user to install Ubuntu applications that they want to use. Ubuntu | Dell US  Not sure that there is an Ubuntu application that is equivalent to the Dell Alienware Command Center Application.  Dell advocates using the Windows 10, 64-bit or Windows 11 operating system, and this includes the Dell Alienware Command Center Application.  
Alienware commande center don't support Ubuntu users ... why ... 
Dell G15 5510 28gb