You need both architecture and engineering to ultimately deliver and maintain value for the customer. This is an obvious statement but these two practices are often confused or used interchangeably. I found this definition / statement from Andrew Townley helpful in terms of keeping the “lines” less blurry

If you’re implementing someone else’s design or creating the design of something mentioned in someone else’s design…you’re an engineer..if you’re the one doing the design…or, in most of the cases we find ourselves trying to surface, document and communicate the structure and interconnections of the way our organizations work, identifying critical functions in the context of delivering some kind of thing that ultimately will be recognized by someone as being of “value”..you’re an architect~ Andrew Townley (2023).