It depends on why it thinks your graphics card isn't supported.If it's a brand new card that Oculus doesn't recognise yet (like a new 3000 series geforce) then maybe something could be done (mainly wait until they add it).If it's an Intel GPU, then that isn't Oculus compatible. It will never work.If it's an AMD or Nvidia card that isn't on the supported Link list, then it doesn't have the required video encoding support or performance required for Link to function. Supported and unsupported list: https://support.oculus.com/444256562873335/
Fair enough, but I doubt that's what's going on here. When I installed Oculus a few years back on a borderline system that both CPU and GPU were not supported, I was at least able to install the rift software and had to put up with the warning banners.
Of course it's all guess work without knowing what the OP's specs are. I suspect not enough to meet the system requirements to even install the software. https://support.oculus.com/248749509016567/?locale=en_US
And with link having even higher requirements than rift, https://support.oculus.com/444256562873335/?locale=en_US
I strongly suspect the OP will have to pay good money for a GPU upgrade if possible or a more capable PC if not.