Flash the provided recovery image and vendor boot image via fastboot using "fastboot flash recovery recover.img" & "fastboot flash vendor_boot vendor_boot.img" (If you are on any los-based recoveries, you don't have to flash recovery)
Reboot to recovery using either volume + and power button combo or via fastboot command
Navigate to Apply Update > Apply from ADB
adb sideload the pixelos zip using "adb sideload crDroidAndroid-14.0-20240816-peridot-v10.7*.zip"