Where can I look for the gear Tait Nucleus? uses?

Find and submit the pianos, keyboards, synths, microphones, and other instruments used by Tait Nucleus?.

If the artist is active on social media, check places like their Instagram feed and look for musical equipment they can be seen using.

You should also do a Google image search for things like "Tait Nucleus? studio" and "Tait Nucleus? live" and spot gear that way.