"Court packing" would be breaking a US government norm.
A norm, very similar to, Mitch McConnell not bringing Merrick Garland's nomination to the Senate for 8 months, because "You can't nominate a SCOTUS justice in an election year".
Also breaking a norm very similar to Mitch McConnell shoving through a SCOTUS justice 8 days before an election.
If "Court Packing" happens, it is a direct result of bad faith norm breaking by the Republicans. But you knew that.
Elections have consequences.
https://www.wbtv.com/2020/09/30/trump-filling-supreme-court-...
Winners make policy, losers go home.
https://thehill.com/homenews/senate/320506-mcconnell-winners...