The same fuck machine can be repurposed for pushing and dragging a Tenga or anything similar with the same features, but instead of inserting they are handling the stationary coomer.
Now here's the kicker: if both ends use devices compatible with Lovense system, they can share instructions over the web, either if one of the ends are handling theirs or multiple being linked to the pay-per-instruction system most Fansly whores use.
It's a lot of work and money for a failed fantasy, nevertheless hundreds of thousands of desperate individuals invest in that technology, the pandemic just made it extremely popular among camsites users.