So I need to create subworking locations related to a workingcenter and I can't use alternative workcenters as those would have childs as well.

So WC1 and WC2 are alternative workcenters between themselves, but location WC1.1 and WC1.2 are related to WC1 and can't be alternative locations of WC2, nor they are WC1 (they are just a subworkcenter).

I've come across this module for the enterprise version, but we use community and we can customize it ourselves.

https://apps.odoo.com/apps/modules/14.0/app_mrp_workcenter_zchart/

So before starting, any insight or hints on how to customize it? Has anyone done this before?

Thank you.