Your text a bit confused...
Bitcoin SV is a Bitcoin Cash (BCH) Fork.
In other word, did you have BCH when the BSV fork took place? It was in November 15 of 2018. You need to have BCH in your wallet by that date. Did you have it, or did you already traded it to BTC by that time?
If you want to claim SV fork you need to be cautious, because BSV doesn't have replay protection, so you can spend both your coins without noticing. I don't know exactly how do you claim it, but Coinomi Wallet does support both forks and I thnk it is safe to claim from there (I would try in coinomi).
I found this link from Coinomi about this:
About replay protection:There is no replay protection between the BCH (ABC) and the BSV chains. This means that, unless you properly "split" your coins, transactions you make with one of those coins will also be made on the other.
Sending unsplit BCH will result in the same amount of BSV being sent to the same address (and vice-versa). The receiving wallet may not be prepared to accept BSV into their address, so there is a possibility of loss of BSV coins. This is not an issue specific to Coinomi, as any other wallet you use is under the same risk.
How to split coins:
Splitting is only necessary if you had a positive BCH balance on November 15th 2018. If you received either BCH or BSV after that date, they are most likely already split.
Receive a new deposit into your BCH wallet of BCH that is already split. The easiest way is to receive BCH from an exchange.
After transaction from (1) is confirmed, copy your current BCH "receive" address and send your full BCH balance to it.
Done. This should be enough for your coins to be split. This process only has to be done once. After your coins are split, they are split forever, and further deposits you receive will also most likely already be split.
How to claim BSV coins:Only do this if your coins are already split, otherwise the transaction will happen with both coins.
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https://coinomi.freshdesk.com/support/solutions/articles/29000026274-bch-abc-bsv-fork-information-splitting