How?

There's no workplace to speak in hushed tones. There's no manager or de facto leader to make first contact with union representatives. There's no way to know when you've reached a quorum of local drivers.

Make no mistake, I sympathize with you. Rideshare/third-party delivery drivers have become America's new techno-feudalist underclass.

They already have: https://www.gmb.org.uk/campaigns/deliveroo/

The critical industry of McDonald's delivery will never pay a living wage. There's not enough value. Folks will have to self-select out.