The details of a job posting doesn't necessarily translate to the actual job.
For example it's not uncommon to overstate experience required or give examples of related experience.
So when the posting says "looking for someone with experience in OpenGL, Vulkan, DirectX"
That doesn't mean they are looking for someone with all 3. And it doesn't mean they are going to use all 3.
Regardless, even one of the 3 translates to some new development, as opposed to nothing new at all.