Low Earth Orbit (LEO) satellite constellations are emerging as a cornerstone of next-generation communication infrastructures, and their significance for Internet of Things (IoT) ecosystems continues to grow steadily. LEO satellites operate at considerably lower orbital altitudes, thereby mitigating signal propagation delays and significantly reducing communication latency. The adoption of advanced multiple access techniques is indispensable, as they have to manage scarce spectral resources while supporting the exponential growth in the number of connected devices. Such techniques are required not only to enhance spectral efficiency and maximize achievable throughput but also to ensure robust and reliable connectivity in highly dynamic and interference-prone LEO environments.