ygov.finance

You have to stake your YFI at ygov.finance in the v2 tab under Governance V2 or in the yYFI vault to have your votes counted. Since Yearn uses Snapshot for off-chain votations, for each YIP voted off-chain there'll be a snapshot at a given block of all the YFI tokens staked in governance and in the vault. Only people with YFI staked in governance or in the vault at the time of the snapshot will be able to vote in that YIP.