Where is rp-pppoe-relay package? [ Archer C7 V4 (TW) ]

I'm looking for how to enable PPPoE Relay (PPPoE Passthrough) for Archer C7 V4 (TW).
I installed LEDE firmware version: LEDE Reboot SNAPSHOT r5440-c7b052d / LuCI Master (git-17.328.04231-802d5b6)

I know there is a package named rp-pppoe-relay.
But in newest OpenWRT packages doesn't have it.
https://downloads.lede-project.org/snapshots/packages/mips_24kc/packages/

I found the old builds has package
https://downloads.openwrt.org/barrier_breaker/14.07/ar7/generic/packages/oldpackages/rp-pppoe-relay_3.11-1_ar7.ipk
Filename: rp-pppoe-relay_3.11-1_ar7.ipk

root@LEDE:/tmp# opkg install rp-pppoe-relay_3.11-1_ar7.ipk
Unknown package 'rp-pppoe-relay'.
Collected errors:
 * pkg_hash_fetch_best_installation_candidate: Packages for rp-pppoe-relay found, but incompatible with the architectures configured
 * opkg_install_cmd: Cannot install package rp-pppoe-relay.

and I tried this, which indicate the same target (which same as ar71xx )
https://downloads.openwrt.org/barrier_breaker/14.07/ar71xx/generic/packages/oldpackages/rp-pppoe-relay_3.11-1_ar71xx.ipk
Filename: rp-pppoe-relay_3.11-1_ar71xx.ipk

root@LEDE:/tmp# opkg install rp-pppoe-relay_3.11-1_ar71xx.ipk
Unknown package 'rp-pppoe-relay'.
Collected errors:
 * pkg_hash_fetch_best_installation_candidate: Packages for rp-pppoe-relay found, but incompatible with the architectures configured
 * opkg_install_cmd: Cannot install package rp-pppoe-relay.

The result is same, incompatible with the architectures configured.

Any suggestion is welcome.

I believe the LEDE packages are rp-pppoe-common and rp-pppoe-server

I already install both rp-pppoe-common and rp-pppoe-server still not found pppoe-relay command. :expressionless:

I installed both and couldn't find it either.

You might check OpenWRT packages...