Recreating photosynthesis is the easiest part by a huge margin.
Whether you decide to define it as synthesizing ATP or glucose, both a simple molecules that we can create in a lab. Everything else is the hard part, there is a huge amount of “things” on that “everything”.
You have to figure out how to recreate photosynthesis which, believe it or not, is an incredibly difficult process to recreate.
Recreating photosynthesis is the easiest part by a huge margin.
Whether you decide to define it as synthesizing ATP or glucose, both a simple molecules that we can create in a lab. Everything else is the hard part, there is a huge amount of “things” on that “everything”.