The tech salaries you see discussed in the US are in jobs that also cover healthcare, so we don't pay out of pocket each month for health insurance. And these jobs include "unlimited vacation", however most people don't take more than about 4 weeks a year.
central Europe here: You have to take the vacation! You can take a few weeks in the new year, but not everything and you have to consume them.
Why "have to"? Because it's by law forbidden to bully employees into taking money instead of going on vacation. To never have to deal with this, most employers are very strict wrt vacation days :)
When I worked for US companies that paid employee health insurance premiums, my family's premiums appeared on my W2 as taxable income. Only my own premium was "covered" in a way that did not increase my tax burden.
Health insurance (for dumb, path dependent, historical reasons) for individuals and their families are not taxable, haven't been since WW2.
What you may have seen is the AMA line item that just tells you how much your employer spent on your healthcare. This is a weird attempt to get people to realize how much their employers are paying (much more than the premiums people generally think of as covering their health insurance).
If your employer happened to pay you more than the maximum allowable cost per employee, then your employer had to pay a 40% excise tax on the amount above the limit, but even then, it wouldn't be taxable to you. The roll out of this tax was delayed several times, it may have been repealed, I wasn't paying attention during the pandemic.
