This is a paid asset, but now you can download Match 3 Games Audio Kit Free.
Detail this asset from Unity Store: Original Link
Match 3 Games Audio Kit v1.0
“If possible, please buy the package to support the developer”
Match 3 Games Audio Kit is the perfect audio solution for Match 3 Games. It contains some high quality musics and ambience loops, and special sound FX, both isolated and premixed, in MP3 format and ready to use.
* 130 audio clips in total, including 10 background muscis and 120 soundfxs.
* All sounds in .mp3 format.