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I cannot name the manufacurer of the display - I bought it from e**y as "Raspberry Pi 5" HD 800*480 Capacitive Touchscreen Display+USB HD Interface Q1N4" in 2019. It looks similar to the Elecrow RC050 device, but features a mechanical backlight switch. Display and touchscreen setup should also work with other displays like the RC050, but you need to figure out how to switch the backlight with a GPIO pin.
The display backside looks like this:
The backlight switch is on the left (below the two Micro-USB sockets) and has the following pin assignment:
Warning
You can connect a GPIO pin directly to the backlight pin, but you must ensure that the switch is never set to the ON position. This would connect the 5 volts to the GPIO pin and destroy at least that pin!
The best way is to remove the switch with a soldering iron and connect two pin headers to the PCB pads (5V, backlight). Then you have the option to put a jumper on the headers to turn on the backlight all the time or use a jump wire between backlight and Raspberry GPIO pin.