"New business terms available for apps in the EU — to reflect the DMA’s requirements for alternative distribution and payment processing, Apple is also sharing new business terms for apps in the EU. Developers have a choice to remain on Apple’s existing terms or adopt new terms that reflect the new capabilities."
So this is essentially Apple making the alternative so unappealing that no-one will switch and status quo is preserved.
"New business terms available for apps in the EU — to reflect the DMA’s requirements for alternative distribution and payment processing, Apple is also sharing new business terms for apps in the EU. Developers have a choice to remain on Apple’s existing terms or adopt new terms that reflect the new capabilities."
So this is essentially Apple making the alternative so unappealing that no-one will switch and status quo is preserved.