Our designated Human Resources is on maternity leave for a few months, and it's coinciding with a stressful transition period of Return to Office. One of my bosses, very high up in the company has taken it upon himself to be interim HR. Is this ethical? This person obviously has a totally different set of obligations to the company and has so far just been shutting down very reasonable grievances and I fear that this person would retaliate if I brought anything up. Can anyone just decide to be HR?