I posted this on reddit, but for your info:
My IPD is 68mm. When I purchased the Rift S I found that due to the IPD restrictions and lack of adjustment, my FoV was restricted and I could see the straight edges of the panel - it was pretty awful and I returned it and kept on with CV1 (and another newer headset).
When I bought Quest 2 I found that I could not see these panel edges - the edges looked the same as per Quest or CV1, though the FOV was still restricted compared to those. However, I read posts from others who were finding they could see the straight panel edges and some were returning their headsets due to this.
I have never got on with Oculus face 'gasket' matertials, so I ordered an aftermarket interface and used a face gasket from the VR Covers range - and instantly suffered from the 'straight edge' syndrome! It's a shame, because the increased comfort was outstanding - I also use the rear padding from VR Covers sold for the Quest 1. I'm putting up with the straight edges, but I was thinking, if it works that way round for me, perhaps people who see the edges with the standard OEM gasket may not see it with an aftermarket one.
So perhaps if you do have the issue and find it distracting it may be worth trying an alternate face gasket - preferably thicker than the OEM one, and see if it makes a difference. Might be worth trying thinner, but I think that may make it worse.
I think probably the thicker it is, the more likely you are to not see the straight edges, though you may lose just a couple of degrees in FOV.
It may also be worth trying the provided spacer for spec's - even if you don't use them.