@RickW   hi did you get this resolved?  i'd also like to know how.

  @nrjessup Not resolved to date. TPLink support stated that MOCA is not compatible with their devices. However I there was a tech person who did get MOCA and a XE75 satellite to work. I cannot remember the link that had the resolution. Let me know if you are successful. Thanks!

  @RickW Since you may be receiving tech support from someone in China I'm afraid there's a language barrier issue.  The reason it is not compatible is because it doesn't have MoCA.  That doesn't mean you can't get the pair of MoCA devices and connect them.  It should work/mimic Ethernet.  They aren't common (at least not here in the USA) but are available.  You'd need a pair/set.  (Yes I have seen single ASUS routers with MoCA.  Not sure how you'd use just one except if you already have another or just a simple router with no MoCA).

I could not find a TP-Link MoCA by Google search.  But I do know ASUS ZenWiFi AX Hybrid (XC5) is a combined router MoCA unit available as a single or pair....

  @jzchen   Thanks this is helpful.  I have a moca enabled router (the old Verizon Fios one) which if I understand right, I could leave as is connected to the co-axial and then connect that to the Deco satellite via ethernet.  i am wondering what other configuration I need to do both at the moca router side as well as the deco side to ensure that the backhaul is enabled.  

  @nrjessup

My issue is I have AT&T U-Verse which provides internet as well as wired coaxial TV service. I have not cut the cord so to speak for the TV service. This is the problem for me, for MOCA is not compatible with AT&T u-Verse. I found AT&T technical support useless.

Here’s a link that I found helpful, perhaps you can find it helpful as well.

https://m.youtube.com/watch?v=T_A6Umk9v7o&pp=0gcJCf8Ao7VqN5tD

Good luck. Let me know how it turns out!

  @nrjessup I recall reading that FIOS used the coax to bring "fiber" into the house.  So fiber to the outside of the house, MoCA-coax into the house-MoCA, and ethernet to your modem.  Not sure I understand what you're trying to do?...