The Pixel 3a and 3a XL are reportedly set for release at the next Google I/O event. They may be cheaper versions of the original 3 line, although they may retain advantages such as timely Android updates. A newly-leaked set of case renders for the 2 phones appear to show that they will also have headphone jacks.
https://www.notebookcheck.net/New-Pixel-3a-and-3a-XL-case-renders-appear-to-confirm-3-5mm-jack-and-other-features.416221.0.html