Have you tried the various types from NASA FIRMS ( https://firms.modaps.eosdis.nasa.gov/ ) like the NASA’s Land, Atmosphere Near real-time Capability for EOS (LANCE) ?

The historical data is available, albeit a pain to work with. As to distinguishing between agro slash burns and wildfires, I'd suggest reading the documentation thoroughly.

You can use global forest watch https://www.globalforestwatch.org/