Literally no one cares. Honestly, the megapixel count is the reason to have one camera over another and you are using an A9II with 24 megapixels? There are far, far bigger differences regarding handling, lenses, etc. and the R5 is a perfectly fine option until there is something better with more megapixels.
For every person complaining about low megapixels, there is another who finds the low-light, AF. video benefits useful and simply does not need more.
The overwhelming majority of the press photos right now are still taken on 1DX Mark II bodies. They simply don't replace them as they just keep working forever. But it's not just for stills, that camera with its 4k60p high bitrate recording (despite the codec) with AF was really ahead of its time (it stills blows away an A9II for video, for instance).
This camera looks like a perfectly fine replacement, slightly smaller body, it has all the video annoyances fixed, should be a big step up in stills, too.