You cannot install SFM directly, but you can "stream" it from your PC to your Android phone or tablet using official tools:
Once you have the PC version, you can download thousands of models and maps: source filmmaker work download for android
: You can run SFM on your PC and stream it to your Android device using the Steam Link app You cannot install SFM directly, but you can
While you cannot install SFM directly, there are technically ways to run it on Android hardware, though they come with significant caveats. You cannot install SFM directly