Dual PPOE / Russian PPOE?

Hello all! Hello gl.inet team!
at the moment, my setup is:

fttc modem (bridge mode) - GL.inet router - wifi clients

with my old tp link router, on the wan side, I can create a “secondary connection” (static or dynamic IP who allow me access to the bridge modem web ui (classic please see the uploaded screenshot.

Can I achieve this with my new gl.inet router?

I setup the ppoe session but it lacks the “secondary connection”.

I know this configuration is used by Russian users (tp link call this “russian ppoe”).

It‘s possible but not within the GL GUI

Ok but can GL.iNet add this little feature to the main web gui? thanks!