No.  The known workarounds have nothing to do with the miner (PhoenixMiner, etc.).  Three conditions are required to get a 3060 to sustain full hashrate:

• Directly connected to a PCIe x16 slot (risers do not work, but from what I understand a PCI extension cable should work)
• The Nvidia 470.05 development driver
• A powered-on monitor or an HDMI dummy plug connected

See https://www.reddit.com/r/EtherMining/comments/m65tc4/rtx_3060_share_what_works_what_doesnt_on_47005/