I did not see .qml on the supported list: https://doc.arcgis.com/en/arcgis-online/reference/supported-items.htm
Is there another format that could be exported that may be supported?
You can put it into a .zip archive and upload that, although you'll need to tell AGOL that the ZIP is a shapefile or GDB.
You may be better off opening the layer in an ArcGIS Desktop program and exporting a style file from there. If you just need to host the QML for others to access, consider using a more generalized file platform like dropbox, or even GitHub. AGOL is really meant for use with ESRI products.
I can also export the symbology from QGIS in .sld. Doesnt look like this is supported either?
Currently this is not supported. Are you using points lines or polygons symbols?
Les membres connectés peuvent publier, suivre les mises à jour, et plus encore. Nouveau ici ? Inscrivez-vous gratuitement.
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.