Is it not possible to see the last location even though it was two weeks ago?

As Mr Finch posted, it’s only a limited period … apparently 24 Hrs.

• If the device can’t be located: You see Offline under the device’s name. The last known location is displayed for up to 24 hours. Select “Notify me when found” to get an email when it’s located again.

Cite: https://support.apple.com/en-au/guide/icloud/mmfc0f2442/icloud

Seems perhaps a little “too short” to me. 🤔

(But I’m sure that 24h DOES satisfy the needs of the vast bulk of individuals looking for their misplaced devices)

FindMy doesn’t constantly “track”

It only “finds” when you ask it to.

You phone will additionally send a single “last known” position when it’s battery reaches “critical low” which WILL show up on FindMy.

If the phone is “off” it’s position will not update.

If you can’t see it when you log in to https://icloud.com/find then the last location has been lost. It does not hold it forever.