Configuring unusual network layout with multiple PPPoE DSL

I have a network layout with one Ubiquiti Edge Router PoE with 5 ports, a Windows 10 machine with two Ethernet ports with VLAN support and 3 DSL modems with PPPoE (no routing only PPPoE) I have installed a "connection merger" software inside the Windows 10 machine that allows to create one big connection out of smaller internet connections I will be sharing this merged connection from the Windows 10 computer to the same router and to another switch (if possible). My issue is that Windows only supports one PPPoE client at a time. Is there any way to connect the three modems to the Edge Router, make the three PPPoE connections there since it supports it and somehow pass their internet connection to the windows machine through another interface of router using virtual interfaces? This has to be done using the given hardware only. And if anything I can settle with only having two of the PPPoE connections run through the Edge Router if using all 3 is not possible.