Based on this product's specifications, here are some alternatives and similar models
Xrec floating hand grip for action cameras — compatible with GoPro Hero 7/6/5/4/3+/2, SJCam, Xiaomi
Summary description:
Floating hand grip by Xrec designed for action cameras. Provides buoyancy to keep GoPro Hero 7/6/5/4/3+/2, SJCam and Xiaomi cameras afloat if dropped in water. Serves as a handheld stabilizer and mounting point for one-handed shooting, snorkeling, and water sports. Lightweight, easy to attach and use with standard camera mounts and thumbscrews.