For a trip abroad I recently bought an alternative to Apple’s AirTags sold by the Dutch chain Kruidvat. The Kruidvat Smart Finder costs just €10 and can be registered as an ‘Other Item’ within the FindMy app.
Once added to the app, the tag behaves just like a regular AirTag and even allows you to share it with other Apple users. Only the hardware looks a little different. Compared to the original, the Kruidvat tag seems a bit power hungry. After three weeks on the road with my tags, the one that was the most active because I had it in my backpack was already low on battery power. The others basically stayed behind with the luggage at the lodge and rarely moved, only losing a single bar.