My situation is a bit different: switching from iOS to ML. One thing I could say is that iOS development is a fun experience. I did it for the past 5-6 years of my career and was self-taught. I learned both Objective-C and Swift during my time in that world. Doing iOS development has taught me a lot UI/UX, amongst other things.

Recently, I switch to a role in ML and its been a change in my workflow so far - which is something I expected, but fun nonetheless. I don't get to do UI/UX in the visual sense but now I have to care about design of ML models and deployment so that other front-end clients can use them.

I would say give iOS development a go ahead because you want to!