This is rough. As a developer, I can 100% see why there could be a ton of legit reasons to need this. As a user, there's no way in hell I would trust you not to be nefarious, unless you had a very detailed and clear explanation AND the rest of your app also strongly signaled "competent and trustworthy." And even then I would be wary. The company/app you trust today could be acquired by a company you despise tomorrow. But also as a user, I find location tracking for myself to be incredibly useful.

To that last point, I am curious: is there any good comprehensive open sourced and audited alternatives to eg Tile or Find My?