The Brother MFC-J4335DW is not officially compatible with macOS Sequoia 15.0. Brother supports many models for newer macOS versions, but specific support for the MFC-J4335DW model on macOS Sequoia 15.0 is not confirmed.

It is possible that some basic functions such as printing via universal protocols such as AirPrint may work, but for full scanning and functionality you should check the specific Brother drivers and software available for your macOS version. So far there are no official drivers or support instructions from Brother for the MFC-J4335DW on macOS Sequoia 15.0.