How to configure pppd/pppoe for sysfs and not use dev

[Snaketails]

Ok, got no replies on last ppp question. .

How can I configure pppd to use sysfs and not /dev/<ethX> device

My ADSL has gone down, pppd is complaining that enp4s1 doesn't exist, and it doesn't exist in /dev

My 2nd ethernet device enp2s0 is happily bonded to the bridge network, and it's also not in /dev, but it's working so there should be a way for pppd/rp-pppoe to also work