Question on WAN smoothing when using our own SFC servers

General questions:

We use our own cloud instances for bonding with either Digital Ocean or Vultr, and they work great. We achieve nearly 500 Mbps throughput when connecting with an MBX mini.

As for WAN smoothing, I can enable it on the MBX side. Do I also need to enable it on the cloud instance side? When WAN smoothing is enabled, does it only operate in one direction?

With the Peplink SFC service, since we can’t modify anything on their server side, we can only adjust our side. Can we just modify our side’s WAN smoothing settings, or do we need to adjust the far side to match?

Thanks!