[EDIT: 2023-10-12 now with feature voting poll]
I have already reported this via Resolume support email.
AFAIK as of Wire 7.8.0 there is no sub-patching. If there is indeed a way of achieving this, please advise.
I appreciate that Wire is new, but this is the single biggest short-coming in current Wire. It means that patches quickly grow out of control, groups of nodes that perform a well defined task can't be reused in another patch unless you copy and paste, and one can't organise patches well using probably the most important idiom of patch-based programming (if you don't count processing nodes with inlets/outlets themselves). There are no serious patch-based programming environments that don't have sub-patching.
One needs to be able to draw a box around any group of nodes in a Wire patch, and have a reusable named new sub-patch Node created, with identified inlets and outlets, with instances of it useable in other patches.
If you are a fan of Wire and wish to help prioritise this feature request, please add your support here.