I've been wfh as a freelancer during lockdown - I also did a masters degree during lockdown. Applied for staff jobs last autumn and have been offered one with working hours of 7am to 4pm but have been told most staff stay till 5pm.
I've never worked a day as long as this. Not even in the early years of my career - and I did find working 8 hours a day with a lunch hour. To get into work (office) for 7am I have get up between 4.30 and 5am.