This Recommendation specifies accessibility requirements for metaverse services supporting IoT, complementing ITU-T Y.4204 by addressing issues specific to immersive and digital twin environments. It identifies three key areas: sensory perception, spatial navigation, and communication/action. The text requires alternative representations of visual and audio information, support for assistive technologies, personalization of virtual objects and audio characteristics, and clear notification when adaptations such as size scaling, contrast adjustment, colour change, or sound modification may distort real-world information. Its aim is to ensure that persons with disabilities and users with specific needs can access, understand, navigate, communicate, and interact effectively in IoT-supported metaverse services.