Teachers in England and Wales have an insidious clause in our contracts which says we must do as many additional hours as is needed planning, marking etc to "discharge our duties". I don't know if this is the norm in other countries, but the expectation of our contracts is we work well over our directed time.
I know someone who had a contract in FE which specifically paid her for 30 minutes prep/marking for every 1 hour teaching. So for a teacher in a UK school with 25 hours of teaching a week, that's 37.5 hours a week- i.e. a full time job, before you factor in anything like: meetings (school or with parents), CPD, responding to emails, admin tasks, duties, supporting students e.g. through revision sessions etc.
In the last week I've had- 40 minutes scheduled meetings in school, 30 minutes of compulsory CPD, spend probably a bare minimum of 20 minutes a day on emails, sometimes a lot more, about 1 hour on report writing, 1 hour supporting students with catch up. I'm really lucky in my current job I don't have any "duties" but in many jobs that would be another half an hour each week.
So in total that's potentially just over 42 hours this week.
BUT then you have to factor in "occasional" things like parents evenings, open evenings, information evenings, that time a kid has a crisis and you end up staying late, that day when half the department is off so you come in early to help out, twilight CPD, mock marking, that time you end up on the phone to a parent for 30 minutes unexpectedly, trips and loads of other stuff. So that can easily add up to 50 hours a week.
As soon as you add in any additional responsibility or running a major extracurricular, I can see it easily see it becoming well above 50.
I know teachers who teach outside the UK, or in international schools and nearly all of them have way more non-contact time built into their teaching week than the 10% UK teachers get AND a lot of them get paid extra if, e.g., they run a club. Things like after school revision sessions etc also don't happen.
And functional social care/mental health care/social services helps, too.