You still seem to be missing the key point: if you want to claim that industries tend toward concentration in general, citing particular concentrated industries isn't going to cut it.

Well... I gave you some examples in trillion-dollar industries and asked for counter-examples.

Many of your counter-examples -- car dealerships, spas, hair salons, etc -- are niche markets.

Few of them were multi-billion industries, and they provide more examples of consolidation.

Just google for "consolidation in restaurant industry" and you will find articles like "6 reasons for restaurants' massive consolidation wave", "Deals and consolidation dominate restaurant industry".

How about the small restaurants? According to "Food Delivery Consolidation: Good For Now, But Not For Long", platforms such as Uber Eats and GrubHub are taking 10% to 40% of gross transactions:

"With the rise in demand for their service, combined with the dire situation COVID-19 has created for most of the population, platforms such as Uber Eats and GrubHub are facing increased scrutiny over restaurant fees that can range from 10% to 40% of gross transactions, according to restaurant owners. (...)

In the future, retailers and customers can expect to pay even more in delivery fees, as the few delivery conglomerates monopolize the market and limit retailers’ ability to sustain a profitable business."