Assuming you're like me and flow means learning interesting things and being engaged with the results...

Run tons of experiments. Turn yourself into a researcher. If you don't have a constant interface to the latest interesting experiment results to engage with/learn novel things/see novel solutions, you aren't running enough experiments.

Running an experiment means you don't already know the result, and you've looked at the prior art so you are doing genuinely new things. Establishing this prerequisite is completely trivial with modern agents.

Hopefully the answer is interesting and impactful enough that it will be useful in your work. This is honestly easier than it sounds; if you're a smart person working in a field where people are willing to pay money for impactful results, you can do this.

Anything that's not running experiments -- including debugging -- is grunt work that you should automate away, and you increasingly can if you set up your harnesses correctly. Make a pipeline so that the novel results of your experiments are polished, packaged, and shipped by your agents. How to do this obviously varies by domain but it's increasingly possible for most things.

And if your job is not doing the above, I have bad news for you: your job is going away fast. So you might want to set up a day on the weekend to give this approach a try; it'll be good for your flow and your career.