Installation e os foundation pixel 4a stopped at step 17/20

It will largely be following this Install /e/OS on a Google Pixel 4a - “sunfish”.

You know it is unlocked.

  1. you cannot boot into e-Recovery.

In which case one or two partitions may have been flashed but not knowing which I propose you do all (no duplication type harm can happen).

First to check is that you can boot into Fastboot mode. That step appears in the install page. Start point

Flashing additional partitions

but you will have to check though all “Requirements”.

  1. you manage to boot into e-Recovery and it seems working you can pick up at that point.

There is also [HOWTO] a Safe Guide to install "IMG-e-builds" even if the /e/ web installer fails