You can post AI music straight to SoundCloud from ElevenLabs

SoundCloud has partnered with ElevenLabs to allow direct publishing of AI-generated music from ElevenLabs to SoundCloud, eliminating the need to export and re-upload tracks. The integration is less deep than SoundCloud's earlier partnership with Moises, which supports stem separation and remixing. SoundCloud Artist Pro subscribers will receive three months of ElevenMusic Pro for free. Songs published this way will be labeled as AI-generated. SoundCloud has generally been more receptive to AI music than other streaming services, partnering with multiple generative AI music platforms while maintaining rules against impersonation and encouraging EU users to label AI content.

(Source：The Verge)