Some OEMs provide their own customized UI while others do not provide such privileges
Android is an innovative OS, with an appealing interface and efficient hardware and software. Some OEMs provide their own customized UI while others do not provide such privileges. Thus you are stuck with using either the default AOSP interface or launcher apps, which are only limited to home screens or app drawers. Androids, most amazing thing is its open-source nature, meaning you can change anything and everything, for the way your device functions, to the internal looks of the device.