Handoff can work reliably in one situation and fail silently in another, and there should be a systematic way to figure out why.
Do all involved devices need the same Apple Account, Bluetooth, and Wi-Fi — and are there additional requirements that are easy to miss?
Whether failures usually stem from a specific cause, like conflicting settings or stale Bluetooth state, would help a lot.
What diagnostic steps should someone work through before assuming the feature is broken?