SFM is built directly into the Source engine, which was never fully ported for mobile content creation.
If you have seen "SFM" listed for Android, it is likely one of the following: SFM SDK for Android: developer library source filmmaker work download for android
Source Filmmaker (SFM) is a free video editing and animation software developed by Valve Corporation. It's primarily used for creating animated videos, short films, and machinima (videos created using game engines). SFM is built directly into the Source engine,
This is the fan-favorite for mobile machinists. It supports imported FBX and OBJ files (you can port Source models using programs like Crowbar on a PC first). You get a timeline, keyframes, lighting, and camera controls. and camera controls.