I will not be surprised if Google relaunches Google Reader in 2023. Without fanfare, and as a simple, limited and low-effort product as Google Podcasts (https://podcasts.google.com).
It will be a nice experiment for them, they don't dominate on the Social Media or Newsletters field, and a RSS reader challenges that field in some ways. Also a act of redeeming the killing of that product 10 years earlier (for a mostly nerdy/vocal minority).
If successful obviously they will put ads on them later (Google Podcasts remains ad-free for now).