I don't like writing code for the sake of it, and have gotten a lot better, over 25 years of writing code, at evaluating whether I need to write code or whether I'd be better off using something that already exists and putting up with its limitations, or even just doing nothing (see that XKCD comic with the time-savings payoff chart).

The result is that I don't think I've written anything longer than about a ten-line shell or python or JS script for my personal use in... a decade or more.

Frankly I probably think you shouldn't be paying anyone to do the thing you're wanting to pay me to do, because computers are likely just an expensive distraction that management's pursuing because the promise of legibility, even if in-fact pointless in this case, is incredibly enticing to them, but also I like money and will build the thing you shouldn't be building for you if you pay me. I'll even do it well, if you let me. But I don't make the same mistake (much) in my own life, any more.

Would I write a bunch of code on my own if I thought it'd be worth it? Yes, but that'd almost certainly mean I had a product idea. If I were any good at thinking of product ideas, I'd long since have had my own business. I'm terrible at it. That's literally the only reason I'm applying for a job. If I had a pile of decent code to show you, it'd be because I didn't need your job.