Listen without rushing to fix things, ask what would help, and offer a...

https://bizzmarkblog.com/what-should-i-say-when-my-brother-keeps-skipping-family-gatherings/

Listen without rushing to fix things, ask what would help, and offer a practical step, like going with them to an appointment. Try: “I care about you. Want me to sit with you while we plan?” Keep clear boundaries