Based on this product's specifications, here are some alternatives and similar models
Magnetic Ring Accessory Spigen Nano Pop (MagFit) — metal and silicone, Black
Summary description:
Spigen Nano Pop (MagFit) is a MagSafe-compatible magnetic ring accessory made of metal and silicone in Black. Supplied as a single-piece pack, it attaches to devices or cases to enable magnetic mounting and alignment with MagSafe chargers and mounts. Suitable for stabilizing phone connection to compatible magnetic holders and for improved handling.