So the choice remains to either buy the product or don’t, this allows the streaming services to pretty much charge as they please or introduce advertising. By bundling these services together will this not reintroduce competition to a certain extent allowing consumers to choose bundles/providers?

No because as they all consolidate they're going to increasingly tether choice to broadband access, which is an inherent monopoly. Forcing me to buy Charter's shitty cable, phone, and cable TV service just to get an ad-free version of Disney+ is not inherently more competitive