https://wccftech.com/google-pixel-4a-might-be-launching-in-june/

Google Pixel 4a is anything but officially confirmed at the moment. The device has leaked a number of times and in all honesty, it is safe to say that it exists. We have seen everything from retail boxes, to camera reviews showing up on the internet. At the moment, the only thing we need is an official confirmation from Google itself.

There were assumptions that the device will be launching at the Google I/O but since that's cancelled. The latest report suggests that the device will be launching in June, later this year.