Problem installing Sonoma 14.2.1 on iMac14,2 with freshly formatted APFS fusion drive from USB

When trying to install from a USB-installer the iMac reboots after initial Sonoma setup. But rather than continuing the installation it just reboot on the USB-installer again. Installation files are on the fusion drive, but can't get them to run. Resetting PRAM and NVRAM did nothing. Please help!

submitted by /u/wanagawachipi
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