So basically all grocery stores that sell their own branded stuff as well are blocked?
"First, by passing legislation that requires large tech platforms to be designated as “Platform Utilities” and broken apart from any participant on that platform.
Companies with an annual global revenue of $25 billion or more and that offer to the public an online marketplace, an exchange, or a platform for connecting third parties would be designated as “platform utilities.”
These companies would be prohibited from owning both the platform utility and any participants on that platform. Platform utilities would be required to meet a standard of fair, reasonable, and nondiscriminatory dealing with users. Platform utilities would not be allowed to transfer or share data with third parties."
Note the word 'tech platform.' TFA also goes on to illustrate that this effort is essentially identical to trust-busting that has occurred multiple times over the past century when a single company became so large that it distorted an entire market.
Additionally, Trader Joes ONLY sells white-labelled products, so it is even less applicable than your other examples.
Their mix is heavily skewed toward private-label products, but "ONLY" is not accurate.
To pick one example: they sell name-brand beer alongside their private labels.
In most cases, a market (in the specific sense, like a store or a site) will white label a product and undercut competitors by leveraging the volume/wholesale pricing that they can get. What's truly dangerous about the AMZNs and GOOGs (and Standard Oils and Ma Bells) of the world is that they can use brute monetary force to buy or subsume competition. To quote the legendary SF grifter Jack Black, "You can't win."