Many children experience separation anxiety at different stages of development. For some it may be short lived until the child adjusts (a phase) For others it may be more chronic and continue beyond the baby and toddler stage. This includes extreme anxiety around the idea of being separated from a parent/carer and can lead to school avoidance and extreme distress. This can also be extremely distressing for parents and challenging for other organisations and adults to manage.
For more information please see the following links:
Separation Anxiety | Psychology Today United Kingdom
Separation Anxiety (justonenorfolk.nhs.uk)
Separation anxiety in children and teenagers | UK (clinical-partners.co.uk)