V8 was old coin. It never showed actual new blockchain SFT/SFX balance. The migration table simply populated from the database related to migration.
You should’ve been using Orbiter wallet since April 2019, until the December hardfork when the marketplace code went live and the Orbiter stopped syncing past the hardfork block.
Since then, you should’ve been using the cli, if competent to use it, or awaiting the TWM wallet, which has been published as a prerelease for windows several days ago. The Linux and Mac versions are expected soon as well.
Assuming you allowed the migration wallet to create your new Safex blockchain address (address begins with Safex…) then a forced popup to save a .txt file containing your new address and keys would have occurred during the migration steps.
You need those keys to do the restore in any of the new blockchain wallets.