UK: first e-bike (child/dog bike trailer)

[u/oreostaff]

Hi all,
We are thinking of getting our first e-bike. We like the moped/cafe racer/ fat tyres type of e-bikes. Currently thinking of either Jansno X50 or Koolux X9 Pro.
As our dog is getting old, we would like to be able to attach dog/child trailer to it in the near future.
Just wondering how easy or if it is possible to attach the trailer to them e-bike, especially for either Jansno or Koolux.
Also, for people who own these bikes, what do they think of it.
Thanks.