https://wccftech.com/google-has-discontinued-the-google-pixel-4-and-pixel-4-xl-could-indicate-pixel-5s-imminent-launch/

Just three days after Google has announced the Pixel 4a, it seems that the company has decided to discontinue the Pixel 4 and Pixel 4 XL. Now, normally, this would have not come as a surprise but you have to keep in mind that both these devices were released back in October of 2019, and it has been less than a year since these devices were released.

This could either mean two things; either Google is looking forward to pushing the Pixel 4a as the main Pixel device until Pixel 5 launches, or Google is planning an imminent launch of the Pixel 5. Either of the situations cannot be confirmed as we do not have enough information on them.