Based on donor data just about everyone who receives a W-2 is trending to the left.
The only ones that are trending Republican are police officers, self employed independent contractors, and small businesses owners.
People who work big corporations are more likely to trust government and value economic freedom less (especially as cost of living rises to point that they won’t get ahead anyway).
Those who leave big companies to be self employed likely value freedom and want less government intervention.
The problem for GOP is entrepreneurship rates are going down and many gig workers will become de facto employees with changes in labor laws
While I believe you, I am honestly surprised there is that much room to "trend right" among "small business owners." They have been extraordinarily Republican for an absurd number of years.
They have room to grow among non-white business owners.