https://www.cnet.com/news/pixel-3a-is-googles-answer-to-overpriced-premium-smartphones/

The new phones, which Google rolled out at its annual I/O developer conference, are almost identical to the more expensive models aside from a few concessions. The newer phones aren't water-resistant, lack wireless charging and feature a less powerful front-facing camera.

The 3A also includes a retro feature that was done away with on the more expensive phones: a 3.5mm jack for headphones. Many premium phones, like the Pixel 3, have ditched the jack in favor of wireless Bluetooth connections.