Is there a reward for learning worldly sciences such as medicine and engineering?

The questioner : Yes. May Allah bless you. You mentioned that, if Allah wills, you will discuss worldly knowledge other than religious knowledge.

The Shaykh : But we forgot. Okay. If worldly knowledge brings general benefit, it is excellence in worship. Some scholars (may Allah have mercy on them) mentioned that learning the worldly sciences that people need is a collective obligation. They stated that it is obligatory for Muslims to learn how to make cars, how to make airplanes, and how to make the tools used, and they declared that Muslims must have something to secure their livelihood. This is a collective obligation. Most scholars hold that it is not a major sin, but it is something for which one repents.
As for worldly knowledge that contains neither good nor evil, it is a worldly action. As for knowledge that contains evil, it is forbidden.
Such as learning the science of music, entertainment, and instruments of amusement, and the like. This is forbidden, because the Muslim must forget what is forbidden and not establish institutes and schools for it, and the like. Yes.