Most phone analysis chases content: what was said, where the device went. Find My answers a different and often more durable question, who is connected to whom. A family-sharing roster is not an incidental artifact; it is a deliberate act by the owner, naming the people they wanted to see their location. That makes it strong evidence of a close relationship, independent of whether a single message thread survives.
The paired-device list does the parallel job for account control. It shows the other devices under the same Apple account, which corroborates that a person owns and operates the ecosystem an investigation is attributing to them. In matters where identity or account ownership is contested, that independent corroboration can matter more than any single communication. Sherlock surfaces both plainly so an examiner can lay the association record next to the content record and let them reinforce each other.
There is a defensive value to the association record as much as an offensive one. When a subject disputes that a device or an account is theirs, the ecosystem is hard to disown: a paired watch, a family member sharing back, a registered accessory each tie the account to a real person and a real network of relationships. Conversely, an association the record does not show is itself informative. If a purported close contact is absent from a sharing roster the owner curated, that absence is a fact an examiner can put on the record rather than an assumption. The point throughout is the same as with every artifact: report the connections the device actually holds and let the case argue what they mean, corroborated against the rest of the record before any conclusion is drawn.