In the EU, I'm not headphones with jacks will be allowed to be sold (Arstechnica).
Laptops get until April 2026 to comply, but most other things—phones, tablets, handheld gaming devices, computer accessories, and wireless headphones—will have to be powered by USB-C to be sold inside the EU from now on.
I think it's only a matter of time until phones with dual or triple USB-C start emerging.