Give the relative who moved away a chance to belong without pretending they never left.

Distance does two things at once, and families usually acknowledge only one. The person who moved has missed the small daily accumulation of news, and they have also built a life the rest of the family has never seen. Pretending nothing changed leaves them nodding along to references they do not have, while treating them as an outsider leaves them permanently a guest.

When they next visit, fill in the missing context without making it a test, and ask real questions about the life they built elsewhere. Give them a job in the kitchen. Belonging is easier to feel while doing something.