These two companies sound the same... Your company allows remote, hybrid or fulltime in-office. Partner's company allows hybrid (3 days minimum), fulltime (people going above the minimum) or "transitioned to remote".
Well don't I look stupid for initially being skeptical... surely your company, with "no management or oversight" over its employees, is clearly set up for enormous success!
Why wouldn't this occur, in even greater magnitude, at a company with zero accountability regarding the whereabouts of the employees? Where an employee can wake up any morning and just decide not to come in? Where nobody can say with any certainty who will attend a meeting, or be in the building, or available to be on a call, at any time? Where nobody has any responsibility to ensure co-workers schedules line up, or that the person responsible for Task A completes it within a timeframe to allow the Task B person to meet his/her deadline?