No such HDMI splitter exists. An HDMI splitter will clone the output to the displays not extend.
Matrox makes a device called the dualhead2go that can but it uses displayport which your laptop lacks.
Another option would be to use HDMI for 1 display and a usb to hdmi adapter for the other. Just make sure the usb adapter can function as an external graphics card as there are usb c to hdmi that are adapters for thunderbolt ports(which you don't have so they will not work for you).
Example
https
/www.amazon.com/StarTech-com-USB-HDMI-Adapter-External/dp/B00H91BQ7Y/
There also USB adapter for dual HDMI outputs