If you did not search the forum - also past poster just superfluously inquired about the device and disappeared.
Please check if the device has any EAN product code (not passwdors) on the box, any FCC ID printed anywhere.
Can you get a boot log (starting with “Linux version 1.2.3 …..” from the device interface
Any command access from OEM - like telnet or ssh?
Where would you download firmware upgrades?
EDIT: manufacturer page https://global.gztozed.com/products.html (no f***wares given)