ArcGIS Field Maps cannot load geojson layer from URL

[ESRI_User_121]

So I'm trying to load a geojson file from this url https://felt.nsdi.workers.dev/ and it's working on ArcGIS Online. But when I'm trying to view it from Field Maps app it says

Domain: com.esri.arcgis.runtime.error

Code: 7005

Description: Layer type is not supported

Any idea why the issue is occurring? It's 2025 and loading geojson from url should be very basic function in ArcGIS Field Maps.

[KerriRasmussen]

Good afternoon. Geojson files are not supported in ArcGIS Field Maps. You can read more about data requirements here. With that being said, you can publish your geojson as a feature service and then view it in ArcGIS Field Maps.