rro_overlays/TetheringOverlayRM6785/res/values/config.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
** Copyright 2020, The Android Open Source Project
**
** SPDX-License-Identifier: Apache-2.0
*/
-->

<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">

    <!-- List of regexpressions describing the interface (if any) that represent tetherable
         USB interfaces.  If the device doesn't want to support tethering over USB this should
         be empty.  An example would be "usb.*" -->
    <string-array translatable="false" name="config_tether_usb_regexs">
        <item>"rndis\\d"</item>
    </string-array>

    <!-- List of regexpressions describing the interface (if any) that represent tetherable
         Wifi interfaces.  If the device doesn't want to support tethering over Wifi this
         should be empty.  An example would be "softap.*" -->
    <string-array name="config_tether_wifi_regexs">
        <item>"wlan\\d"</item>
        <item>"ap\\d"</item>
    </string-array>

    <!-- List of regexpressions describing the interface (if any) that represent tetherable
         bluetooth interfaces.  If the device doesn't want to support tethering over bluetooth this
         should be empty. -->
    <string-array translatable="false" name="config_tether_bluetooth_regexs">
        <item>"bt-pan"</item>
        <item>"bt-dun"</item>
    </string-array>
</resources>