I'm pretty sure that's only if you're a gatekeeper, which are only the services big enough that my mom would notice directly if they'd go down (things used by millions of people in my country of 18 million). Whether Apple's messaging system, default enabled on every Apple phone, qualifies is currently being debated, to give a sense of what scale this requires.

The DMA/DSA laws also contain rules for smaller parties (I've been getting tons of ToS update emails mentioning the digital somethings act), but not interoperability