While not in a Y cable format, there are small USB-C hubs that can do this. If I plug a NVMe drive into my iPhone, my phone will run out of battery so quickly

While not in a Y cable format, there are small USB-C hubs that can do this. If I plug a NVMe drive into my iPhone, my phone will run out of battery so quickly so I have to use a hub and plug in my charger at the same time.