I've been in a psych ward in 2 different countries, and experiences differ. In Australia, in the psych (ICU), it was pretty intensive. It was less intense and more chilled after I transited to the open unit which was meant to help patients transit to being discharged.
In my home country, almost all psych units are lockdown units, hence it's pretty intense. Experiences differ based on class of ward, and the type of hospital.
In almost all settings, abscondance is almost impossible and self harm/suicide attempts are impossible, and I shudder to know how punitive it can get for someone who's found trying. I tried self harming once while inpatient and I hated what was done to me.