L1200 PPPoE support?

Hello,

I want to achieve an failover between WAN port and LTE, but my WAN provider provides me an PPPoE credentials to establish such connection. I cannot see on the LM1200 settings to set an PPPoE credentials on WAN port. Where I can find such settings? Is there any "hidden" menu to unlock some features?

My firmware version is: 20.06.09.00