SmartThings has dropped these, and Aeotec is not planning to pick them up, so I don’t know of any at the moment.
My guess (just a guess) is that they don’t fit the the new architecture since they never did process locally.
VERY longterm, like 2 years from now, Tile may be an option since Life360 just bought them. But no promises.
Meanwhile, if you have an iOS phone, ibeacons can work well. We use these at our house. There was a thread in 2020 about using these in the UK which is still current. But it won’t work with Android phones.
