IIRC, a business has the right to refuse service under a clause in the ADA which allows exemptions in the case of direct threats to public health and the EEOC already declared that covid falls under this.

HOWEVER, I believe there's still the angle that the business still has to try to provide some reasonable accommodation for equal access to the goods/services

Correct, on both statements.

There IS however per ADA requirements to satisfy the Direct Threat clause. Am I coughing? Sweating? Look pallid? They are a hardware store... grab a IR thermometer and take my temp... which I am OK with.

Since I didn't show symptoms... they had little recourse with that clause.

And yet, as you said... they could have requested I go back outside, after getting my list of what I needed, and complete my transaction from my car in the lot.

But they didn't and that's an additional charge.

I probably didn't make it clear. An apology is what I requested in lieu of escalating to legal recourse. They satisfied my requirement, which was mainly to FORCE them to understand the ADA.