Bitcoin SV is a fork of the fork of Bitcoin that attempts to return to the initial vision of Satoshi to create a crypto currency that is highly scalable. The project was forked out of Bitcoin cash. Today the project has gained a lot of popularity and has more use cases than the Bitcoin and its forks.
In other to make Bitcoin SV more scalable and create a currency that is a peer to peer electronic cash system as well as being about a crypto currency that has larger transaction throughput with low fees, the block size of Bitcoin sv was designed to be as large as 2gb and recently the Bitcoin limit was completely removed.