Can a bachelor of software engineering study masters of electrical engineering?
It depends on the program you apply for your masters degree. Some universities and educational systems accept changing fields for masters degrees and some others not. Some programs may require the applicant to study some more courses from the bachelors syllabus to help them be more prepared for their masters program.

I think you would better ask the program you want to apply to, to see whether they accept and consider applications with different bachelors degree or not.