Here some official builds, available for download from test server:
FP5: https://test.ota.ecloud.global/official/FP5/e-3.0.1-t-20250606498724-official-FP5.zip
Pixel 5: https://test.ota.ecloud.global/official/redfin/e-3.0.1-t-20250606498724-official-redfin.zip
Murena 2: https://test.ota.ecloud.global/official/two/e-3.0.1-t-20250606498724-official-two.zip
FP3: https://test.ota.ecloud.global/official/FP3/e-3.0.1-t-20250606498724-official-FP3.zip
Pixel 7: https://test.ota.ecloud.global/official/panther/e-3.0.1-t-20250606498724-official-panther.zip
FP4: https://test.ota.ecloud.global/official/FP4/e-3.0.1-a14-20250607498722-official-FP4.zip
CMF Phone 1: https://test.ota.ecloud.global/official/tetris/e-3.0.1-a14-20250607498722-official-tetris.zip
Once downloaded, you can start the guide from Feedback for v3.0 - #203 by nicofonk