Hi Wen Jun,
Veeam support all libraries with LTO3 or newer (direct data and control pathes).
There is no hardware compatibility list that limit the support to specific listed ones.
But TS3100 is widely common used with Veeam and you can find them as well on:tape-f29/unofficial-tape-library-compatibility-list-t17488.html
If you have 2 drives in it, please configure only one drive as control path.
Enable auto cleaning in the library and 1-2 cleaning media (replace them over time).
Install the IBM driver (library and drives) in "non exclusive" mode (can be selected at installation).