Barry Allen is The Flash. There is no Barry without Iris, because she helped shape him into who he is, which is how he decided to become the Flash instead of some evil meta. (Also he would metaphorically and probably literally die without her and then there would be no Flash.) Therefore, there is no Flash without Iris West.
That’s just for those of you who are confused, thinking that pseudo science and doctoring someone with self-healing abilities is what makes Barry the Flash. If he didn’t have his team as an Arrow ripoff/plot device/crutch, he’d figure it out on his own. Just like Wally did in Flashpoint with only Iris. Because Iris is the through line for these superheroes, in case you’re not paying attention. Barry needs Iris. Wally needs Iris. Hell, even Bart needs Iris or else he would have been trapped in virtual reality his entire life.
Thank you, goodnight.