Lots of video cable available to split a single output into two monitors.
However, a splitter cable will not provide extended screen (WIN + P to see options) per se. Which is what I believe you are looking to accomplish.
You need two video output ports. A splitter cable from one video output port will only provide the same signal to two monitors.
I remember some DMS-59 splitters that claimed or tried to appear to do that but I never saw any that actually extended the display across two monitors.
The wording was a bit clever using wording such as "extends display to two monitors".... Just duplicated the image in reality.