I'll leave the question of what BMS works with what charging method to others who know more about it.
There is at least one video of a teardown of a Model 3 battery pack, and that's all I have seen of anyone doing anything with a Model 3. It is likely that there have been more Model 3's built than all other Tesla models combined, but they're all still so new that they are not yet commonly available as salvage, so the components (battery or motor) are not being used for conversions yet.
Also, the Model 3 modules are so long that they are unlikely to be useful in another vehicle, unless it also uses a similar under-floor battery pack... and that's a rare choice in conversions and custom cars.
There is at least one video of a teardown of a Model 3 battery pack, and that's all I have seen of anyone doing anything with a Model 3. It is likely that there have been more Model 3's built than all other Tesla models combined, but they're all still so new that they are not yet commonly available as salvage, so the components (battery or motor) are not being used for conversions yet.
Also, the Model 3 modules are so long that they are unlikely to be useful in another vehicle, unless it also uses a similar under-floor battery pack... and that's a rare choice in conversions and custom cars.