You need to make sure you back up as much as possible if transferring from Android to iPhone. Dr Fone's App is supposed to transfer complete Chat history and images.
It most definitely does not work and actually lost my back up by overwriting it in transfer process.
After several emails they did refund me but it was little compensation for losing my Chat History.
Their other Apps may work but this one definitely does not when it comes to tarnsferring from a Samsung Galaxy S7 to iPhone 12