Macbook, Can't boot from USB because has no administrator in startup utility
You can try to run the installer on your USB directly in Recovery mode.
Open up terminal and run ls /volumes. Identify your USB, and then run /volumes/&lt;USB Name&gt;/Install\ macOS\ Catalina.app/Contents/MacOS/InstallAssistant. The macOS installer should appear.
If it did not launch, you can copy your installation partition on the USB over to your internal drive. In Disk Utility, you can create a new partition on the internal drive and &quot;restore&quot; the USB drive to the new partition you just created. Then, select your internal installation partition as a boot drive and proceed to standard installation.