Okay that's interesting, I tried to set ra_lifetime to 1800 but it seems to still advertise as zero:
root@router:~# uci show dhcp.lan.ra_lifetime
dhcp.lan.ra_lifetime='1800'
Under Wireshark:
Router lifetime (s): 0
Any ideas?
About the "not doing the router", I've noticed that it works fine under Windows. Windows correctly pushes the advertised DNS server to the list, but macOS ignores it.
Thank you.