I like crochet or knitting. When I'm working on something, there's usually a period where I do have to focus on the task, but once I get going, I love how I can just do it ambiently, as I'm either doing something else, or nothing at all โ I used to take crochet to my university lectures, and it actually helped me to focus on the lecture.
Similarly, when I made a chainmaille hauberk, I liked how easily I could just zone out once I had a bag of rings and I just needed to interlock them, using pliers. When I was piecing all of it together, I needed to focus, but I spent tens of hours just mindlessly linking rings together