Is a new grad residency a MUST to land a job later? and what are cons of new grad nurse starting out in outpatient, ambulatory surgery, corporate, desk job, remote etc? (non-bedside)

Fresh out of nursing school is the time to focus and gain important bedside skills, both invasive and noninvasive. You can obtain these not only in hospitals but ambulatory as well.
As far as new grad residency, it is not a must but can add valuable credentialing for future opportunities.
Hope this helps.