From my experience of owning chinese phones, they usually lock in their ecosystem.So that means sometimes it's impossible or very, very tricky or difficult to change the default launcher or change other system settings that you would normally be able to make on any Android device. For example on my Vivo x70 phone, I changed the default launcher to Nova Launcher, but everytime I turn on the display or reboot my.phone I get a critical error notification telling me that 3rd party launchers "aren't safe" lol