>Any service or product delivered at a loss seems pretty plainly anti-competitive.
You have to get into the weeds though on what exactly counts as a "product delivered". Like, Apple doesn't charge for new versions of macOS. But are "Macs" separate stacks together or are they the fusion of hardware and software, and if so on what levels? There are all sorts of products surrounding us that are running software that we still treat as unified objects after all, right down to smart light bulbs or a "plain" lithium battery pack which still requires controllers to manage charging and USB negotiation etc. Chips and software are in tons and tons of "basic" hardware stuff yet we just buy the object as a singular entity.
I'm not saying that dumping can't be a thing but the lines aren't always clear cut either. You also have to get into bog standard business scaling issues and profit vs investment. If you take on debt to invest in capital that you believe will lower per unit costs if you build enough volume and then turn a profit, you're "selling at a loss" but that's how tons of business works, that's why there is risk right? Doesn't seem good to discourage that.
It seems more fruitful to approach things from the perspective of monopolies, competition, corporate governance etc in general, granted not that a lot of governments have been great about that either in recent history.