Could not get traffic stats of tunnel interface in Android 10 & 11

Question

Accessing /proc/net/dev is restricted from Android 10 (API level 29). And no luck for ifconfig as well.

I tried to use TrafficStats, in which we have restriction,

Introduced from API level 30:

TrafficStats.getTxPackets("tun0");
TrafficStats.getRxPackets("tun0");

Introduced from API level 31 (Android 12), so I cannot use this in API level 30 (Android 10)

TrafficStats.getTxBytes("tun0");
TrafficStats.getRxBytes("tun0");

So could not get both bytes and packets in Android 11. And NetworkStatsManager TRANSPORT_VPN doesn't work.

Next I have tried to write a C code, used getifaddrs but ifa_data value is null (not used in struct)

Tried ioctl also but no luck.

Kindly help to get traffic stats in Android 10 and Android 11.