Likely that /System/Library/AssetV2 relates to Apple Intelligence (13.9GB on my AI enabled MBP). But, be careful, as my Intel Mac (AI not supported) has 12.9GB in that folder. So, if that is the right place, deleting stuff may have unexpected side effects.
The MBP has two large folders /System/Library/AssetsV2/com_apple_MobileAsset_UAF_FM_General (4.8GB) and /System/Library/AssetsV2/com_apple_MobileAsset_UAF_FM_Visual (4.5GB) which are not present in the Intel Mac. So you might want to start by understanding their purpose.