The downloads for Android Q Beta 4 is now live on Android’s website. Those who are rolled out in the Beta program won’t get this update instantaneously.
However, you can manually download and install the update on your Pixel Device. Here’s the update we got on our PIxel 3a.
As you can see, Beta 4 is build QPP4.190502.018 and includes the June security patch. Users can submit bugs through the Android Beta Feedback app, the Reddit community, and the issue tracker. Two more releases are scheduled before the public launch in Q3 2019.