Enabling SQM on Netdata

I have an x86/64 (22.03.2) router on a stick setup with WAN eth0.10. In /etc/netdata/charts.d/sqm.conf I have

# the SQM interface(s) to monitor
declare -a sqm_ifc=("eth1" "eth0" "eth0.1" "eth0.10" "ifb4eth0.10")

# the priority is used to sort the charts on the dashboard
# 1 = the first chart

Netdata is generally working otherwise. Network interfaces shows br-lan, eth0, eth0.1, eth0.10, ifb4eth0.10.
I would really appreciate it if someone could help me figure out how to get the SQM option to display.