New Network Engineer - Am I Being Undercut? UK vs USA

I’m trying to get some insight here. I’ve been reading through previous posts and I’m BLOWN away by the salaries of guys from the US. Being a network engineer seems to be making $60k-150k+

I’m from the UK, just out of uni and making £28k as a network engineer, which equates to around $38k in the US. So am I being undercut, or is the USA crazily more expensive,or is it just a better job market out there?

I kinda had the impression a senior network engineer in the UK would max out around 45k? Or am I way off.

Any insight would be appreciated!