You are considered a junior developer when you need 'a lot of hand-holding'. Now, I can figure out most things on my own, but how do you distinguish between 'needs too much hand-holding and therefore is a junior' and 'does ok and therefore is a medior'?

For example, I can do well on basic things and getting projects set up, but then I might need more help if errors truly become too cryptic or difficult to solve and I haven't found solutions. A few examples here:
- having messed up the git branches and releases so much that you need someone with a deep knowledge and troubleshooting of git to set the situation straight
- spending a week on trying to figure out why Azure doesn't want to successfully build your super custom build and it takes ages to figure it out because it requires in-depth Docker, linux knowledge and stellar, MIT-level troubleshooting and analytical skills

And so, someone who needs help with these is considered a junior?

How do you really identify a junior? Seems vague.