I've tried this (plus revert of commit 916d2395cc28144261cf6b2a9c528680659f18fd in system/bpf; otherwise isBpfSupported() is unknown!). But unfortunately it shows the same as before: Nothing (0 byte traffic).There's patches for bringing back the old non-BPF network traffic monitoring support.
And, curiosiously, there seems to miss some SELinux permissions, because in enforcing mode the setting app crashes on and on. Only in permissive mode it works; but I can't figure out which permissions are missing...
Every hint is welcome!