Yes, but it will take several years before an appreciable number of players will have RTX cards. Lots of players don't have any add-on graphics card at all, or they don't have an nVidia GPU. Until there's enough of a market, most developers won't bother to incorporate foveated rendering. Yes, the main game engines will, but even then, developers will probably have to add some code to utilize the feature, which means that many won't bother. There are lots of games that don't use the main game engines, like Elite Dangerous.
Until eye-tracking becomes a standard feature, there won't be enough market penetration to make implementation of foveated rendering worthwhile for many game companies.
Like I said, I hope I'm wrong, but I think it will be many years before most games support VR and foveated rendering.