So not everyone goes through all the stages and they don’t have any specific order. So for example denial it’s not unusual to respond to the strong and often sudden feelings by pretending the loss or change isn’t happening. Like for instance a job loss They were mistaken. They’ll call tomorrow to say they need me.” The stages aren’t always for a loss of someone, as stated they can be a loss of other experiences. Here’s a good link to explain it simply https://www.healthline.com/health/stages-of-grief#background