Psychology has an actual definition of what "trauma" means, when considering whether a person has Post Traumatic Stress Disorder, the DSM defines trauma as follows: The DSM-5 definition of trauma requires “actual or threatened death, serious injury, or sexual violence” [10] (p. 271). Stressful events not involving an immediate threat to life or physical injury such as psychosocial stressors [4] (e.g., divorce or job loss) are not considered trauma in this definition. From a diagnostic perspective, the pandemic was not "trauma" to most. Trauma is a real thing with a real definition.

A stressor like the pandemic would be more appropriately categorized as a stressor, with an inappropriate emotional reaction being adjusment disorder. "The DSM-5-TR criteria describes adjustment disorder as a development of emotional or behavioral symptoms in response to an identifiable stressor within three months of onset. The type of stressor may vary in significance for children and adolescents versus adults."

I offer this because the pandemic greatly impacted my mental health and I was actually assessed by a psychologist who explained this to me.