Supply chain workers get zero benefits from UAW deal. In fact, they will be asked to lower costs or lose the contract more than likely to help offset top tier profits. If supply chain threatens to unionize they will pull the plug and move to Mexico or a deep south state and reset salary to entry level in a heartbeat, their margins are too low. I have seen it happen many times. The W.A.R.N. Act is the escape hatch for supply chain companies to parachute out as soon as workers threaten uniziation. 60 days and you can close the doors no questions asked. Thank your local politician for that one.
https://legalaidatwork.org/factsheet/the-w-a-r-n-act-mass-layoffs-or-businessplant-closings/#:~:text=Can my employer lay me,fail to give the notice.