Going back to the 2007, Apple doesn’t reveal the amount of RAM for the iPhone in their marketing.

Occasionally there’s a feature that requires a minimum amount of RAM like Apple Intelligence but that’s the exception.

I don't blame them, consumers won't exactly follow the nuance of tracing garbage collectors and why iOS can get away with less ram vs Android

Assuming it has Apple INtelligence, 8 gigs seems plausible?

Every phone since the iPhone 15 Pro has the minimum 8GB to accommodate Apple Intelligence.