I assume that sample tags are not stored in the file's metadata but somewhere in a .db3 file in the user folder but I have no idea how to retrieve all the tags ?
I strongly suspect it is not possible, at least not in an easy way that would be better than retagging in FL
So I managed to transfer tags but it requires some python code, its not that complicated but can be frustrating.
You then have a .csv containing all files informations, the differents fields are separated by commas, if there are multiple words in the field they are all put between " " like this "Drums, Clap, Digital".
Don't forget to put all the tags present at the beginning of the file and your all good.