It could take a week or two for FA to build a new image.
You could download the latest image from raspberrypi.org
Raspberry Pi OS – Raspberry Pi or Raspberry Pi OS – Raspberry Pi
The instructions to burn it to an SD card are the same as for the piaware image.
Get this running then install Piaware on top.
I just downloaded raspbian and ran @jprochazka scripts from https://www.adsbreceiver.net/ with no issues.
also here ADS-B Receiver Project Setup Scripts
He will also need to rebuild his image to support the 3+, however, they install over a new build.