Colorblindness is something I've been interested in for a long time. I find it incredibly fascinating. I won't act like I'm an expert, but I can say that the colorblindness simulation that VRChat uses is inaccurate.
I have attached examples of VRChat's colorblindness simulation. After that, I have attached images of colorblind simulation from this website, using brettal:
Colorblindness simulation is a great feature for helping mappers to accommodate their maps for the colorblind. However, I'd argue that its important that the feature is accurate. The current state of the feature is inaccurate.
The link above and the link below give a strong overview of how to accurately simulate colorblindness.