The scholars who said it is not allowed to take a wage argued that: These acts (teaching Qur'ān, Ḥadīth, Fiqh, leading prayer, giving adhān) are acts of worship

Those who allow payment said: This is a benefit received by the student, so it is allowed to take money for it, like any other useful service. The middle view, which is stronger, is that: If the teacher is in need, and he uses this to support his family, he can do the teaching for Allāh and still take money to help him continue. Earning a living for one’s family is also a religious obligation. So he combines both intentions: worship and supporting his needs. But a wealthy person does not need to do it for money. If Allāh has already provided for him, then he should teach only for Allāh’s sake, especially since teaching is a communal duty (farḍ kifāyah), and if no one else does it, it becomes an individual obligation. And Allāh knows best. [End of Ibn Taymiyyah’s answer] As-Suyūṭi said in Al-Itqān (Vol. 1, p. 357): In Al-Bustān by Abu Al-Layth: Teaching is of three types: 1. Teaching for Allāh’s sake (without asking for anything) — this person is rewarded, and this was the practice of the Prophets. 2. Teaching for a set payment — this is disagreed upon, but the stronger view is that it is permissible. 3. Teaching without requesting payment, but accepting a gift if it is offered — this is allowed by consensus, because the Prophet ﷺ used to teach people and would accept gifts. Source: https://t.me/qweasdzxcmnblkjpoik/5419