Multiple screens with usbc hub

Hi, I’m trying to connect my laptop to my keyboard, mouse and 2 screens (One plugged with hdmi and the other with vga on the hub and hdmi on screen) via a single usb-c hub.

Keyboard and mouse work perfectly, but the 2 screens are not detected and remain in powersave mode.
If I plug one screen directly on the (single) hdmi plug of the laptop, it works fine, but I’d like to have both additionnal screens, using only the hub. Someone would know about it ?