Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Seek emergency help for a seizure that lasts longer than the person's seizure plan allows, repeated seizures without recovery, serious breathing difficulty, severe choking, a major injury, blue or gray skin color, or sudden unresponsiveness.
Follow the person's emergency plan and local emergency-service instructions.
Routine follow-up may involve primary care, neurology, genetics, developmental or behavioral specialists, rehabilitation therapists, and school or community services.
The care team may monitor seizures, sleep, growth, nutrition, constipation, vision, dental health, mobility, joint range, and spinal curvature.
The article also says
Medication reviews are important because seizure patterns, sleep, weight, and other health needs can change.
Transition planning for adulthood should begin before pediatric services end.
It may cover adult medical care, decision-making support, education, employment or day programs, transportation, housing, and caregiver planning.
Contact the usual care team promptly for non-emergency concerns such as:
New or more frequent brief seizures
Increasing sleep, feeding, constipation, pain, or behavior problems
Repeated coughing or choking with meals
A change in walking, posture, or use of an arm or leg
Loss of a previously stable skill
Medication side effects
Every sign above is quoted from the sofidex article on Angelman syndrome. If you are not sure, err upward — it is always reasonable to be checked.