When an weapon not supported is placed, an error will appear, saying a command that enables unsupported mode. Try it and if it does not appear, something might be broken

how you can activate the unsupportet mode is written inside the moddescrition of wc.

be warned you will end up with every nonwc weapon not having a functional ai and wc weapons not beeing able to intercept nonwc munitions and vise versa, this is due to se limitatations and nothing can be done about it form modderside till se itself is capable to handle multiple full blown weaponframeworks (for example: vanilla, weaponcore) at the same time isntead of beeing just able to handle one weaponframework and weaponframeworkaddons (for example: vanilla+, rearths advanced combat system).

please keep in mind that if you encounter a problem you need to be able to encounter the problem without having unsupportet mode active for a bug report.

also if its triggert by a tool that is just based on a weapon you can request its whitelisting via the wc discord so that it doenst get removed but if its also having an ai it will still have a basically nonfunctioning ai.