Self-directed learning and exploration. I find that a lot of people are unwilling or at the very least not used to actually trying to find answers on their own, writing experiments or just doing things that aren't directly assigned in detail. This isn't to say, "don't ask for help," so much as one should at least try to understand and find answers on their own as an initial effort. Set aside an amount of time to dig in, google, look at results, read documentation, etc. After some effort has been made, then ask as needed.

It can go the other way too... which are those that won't ask for help after exausting days of effort on what may/should be a simple answer.

Aside from this, but similar and related is the understanding of what you're using. The tools, system and projects. Too many times I'll see devs re-create something that's already in the box, or easily put into the box. This includes adding massive libraries to a given project (how many date-time libraries do you need). Take the time to look at the build scripts, docker files, and project dependencies list. More so, if you're using a UI component library, spend the hour or so familiarizing yourself with the example pages demonstrating the library so you at least know what's there.