Based on this product's specifications, here are some alternatives and similar models
ND filter set Freewell for DJI Osmo Action 5 Pro — 4 neutral density filters
Summary description:
ND filter set designed by Freewell for the DJI Osmo Action 5 Pro, containing four neutral density filters. These filters reduce incoming light to help control exposure, enable slower shutter speeds, and smooth motion in bright conditions. Suitable for outdoor action, video capture and time-lapse, the set helps achieve cinematic motion blur and consistent exposure in varying light.