I have all the reasearch required (Deep Excavation & Large Scale Construction) for this building as well as the builders and it is not available to build.
https://www.my-colony.com/reference/techs_h.html#ArchaeologicalDigSite
Am I missing something?
I'm on the Windows 10 desktop platform.
then you're missing a resource. It's always either you're missing the correct bot for it or one or more resources.