2022? That's over. You owe the tax.
2023? If you want to offset the gains, you need capital losses. Understand that buying something new with the intention of selling at a loss is just plan stupid, if you lose $10,000 you save $1500 in taxes. Just pay the taxes. You can't create a loss from thin air.
If you already own investments that have lost money, you might want to sell them to realize the loss. Unless you think they will come back in value and you want to invest for the long term.
