I found the best AirTag wallet alternative that also works with Android - and it's priced well
Briefly

The article discusses the limitations of Apple's AirTag, particularly its bulky design and dependence on replaceable batteries. In contrast, the SmartCard by KeySmart offers a sleeker, thinner option, measuring less than 2mm thick, perfect for wallets. It incorporates a rechargeable battery that can be charged wirelessly and lasts several months, overcoming the need for constant battery replacements. The SmartCard also boasts durability with water resistance, making it a robust and practical choice for tracking valuables. Overall, it stands out as a superior alternative to the traditional AirTag.
AirTags have a few design flaws, including their bulkiness and reliance on easily discarded CR2032 batteries, making them less ideal for everyday use.
SmartCard solves AirTag’s design issues with its ultra-thin profile, rechargeable battery, and added features like a lanyard hole for easy attachment to items.
Read at ZDNET
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