Based on this product's specifications, here are some alternatives and similar models
Evelatus Soft Touch TPU case for Xiaomi Redmi Note 9 — Black
Summary description:
Soft Touch TPU case by Evelatus designed for Xiaomi Redmi Note 9 in black. Made from flexible thermoplastic polyurethane, it provides basic protection against scratches, minor bumps and daily wear while preserving access to buttons, ports and camera. Slim profile keeps the phone compact and adds a comfortable grippy finish for everyday use.