How is Facebook having more of my data in this scenario?
Only if I'm talking a business on WhatsApp (which is optional and will hopefully stay that way), and only if the business I'm talking to uses Facebook as a service provider (instead of, say, Twilio or a self-hosted solution) does something change for me.
Facebook has indicated that businesses processing chats through Facebook will be clearly indicated as doing so, which hopefully puts enough pressure on businesses respecting their customers' privacy to not do so.
Businesses not respecting people's privacy can already choose to share arbitrary data with Facebook for advertisement purposes, so what changes?
Now if Facebook was to discontinue the existing E2E-encrypted business chat integration, that would be something to get upset about.
I'm really afraid that the only lesson that Facebook (and others) have learned in all of this is that TOS changes are best hidden in the fine print of opting into some user-visible new feature via some dark UX pattern, like e.g. Google commonly does.
Does it say there is some sort of opt in to a business conversation, not only now but in the future? No.
So, you are giving Facebook the right to sell your private conversations to third parties in the future, but you think itβs not an issue because you trust ... checks notes... Facebook?