Are you sure that the R5 Mk2 will have Eye Control AF II? Seems like speculation and honestly it is a feature I would happily live without on either the R5 Mk2 or the R1. On the R3 the Eye Control AF never worked with eye glasses unless one use the R3 Eye Cup which was a PITA due to the size and it blocking the screen.
That was actually stated by a Canon senior manager during an interview with a photography website, I would like to say DPR, but I'm not so sure which one.
They asked him about the response to the Eye Control AF function and he said that Canon were pleased with the response they got from their pros and that they are working on the second generation of the technology that will appear in several bodies, not just the next R1.
Based on that statement, it's almost certain that both the R5 II and R1 will have the newer version of this technology. I can't imagine them holding it till the next R3 II release in 2025