platform_manifest_twrp_omni/twrp-extras.xml

<?xml version="1.0" encoding="UTF-8"?>
<manifest>
    <remote name="TeamWin"
            fetch="https://github.com/TeamWin"
            review="https://gerrit.twrp.me" />

<!-- TWRP lives in TeamWin android-10.0 (not AOSP!) -->
    <remove-project name="platform/bootable/recovery"/>
    <project path="bootable/recovery" name="android_bootable_recovery" remote="TeamWin" revision="android-10.0"/>

<!-- Use TeamWin repos for full recovery compatibility -->
    <remove-project name="android_system_core"/>
    <project path="system/core" name="android_system_core" remote="TeamWin" revision="android-10.0"/>
    <remove-project name="android_build" />
    <project path="build/make" name="android_build" remote="TeamWin" revision="android-10" groups="pdk" />

<!-- Include external Magisk repo for repack binaries -->
    <project path="external/magisk-prebuilt" name="external_magisk-prebuilt" remote="TeamWin" revision="master" />

<!-- Include TeamWin android_system_update_engine to build a good update_engine_sideload -->
    <project path="system/update_engine" name="android_system_update_engine" remote="TeamWin" revision="android-10.0" />

<!-- Include Teamwin android_hardware_qcom_bootctrl to build a good update_engine_sideload -->
    <project path="hardware/qcom/bootctrl" name="android_hardware_qcom_bootctrl" remote="TeamWin" revision="android-10.0" />
</manifest>