The whole thing is so meaningless they could move it forward to 2025 and the market would be largely unaffected. It's touted as "petrol and diesel cars" ban, but it's nothing of the sorts - after all, hybrids are exempt from the ban, so all you're going to see is every manufacturer making a "mild hybrid" version of their cars, usually by adding a tiny 1kW battery to help with start-up and....that's it. That's already happening with most brands and models as it is.

Now I don't mean to say that the "hybridisation" is bad per-se - but such a "lazy" effort is not exactly super useful either. For example - Volvo is replacing all of their engine options with at the very least mild-hybrid engines, no doubt in anticipation of this regulation. But for example, looking at the figures for the XC60, there is pretty much no difference between petrol/diesel T5/D5 models and the hybridised B5 models, not to mention that its battery doesn't last for more than a mile and the electric motor can't drive the car faster than 20-30mph anyway - so as soon as you start you know, actually driving anywhere....the car is no different than a regular ICE car anyway, except you're lugging the weight of the battery with you. In my opinion it's an option that only exists to fulfil the regulatory requirement and nothing else, it won't actually be any more eco-friendly in real life usage.

TLDR - the regulation is mostly toothless, since it's very easy to circumvent with a very weak mild-hybrid drivetrain, which most manufacturers are at least in the process of doing.

Edit: - apparently I'm wrong, the new deadline includes full ban of both hybrid and plug-in hybrid vehicles.