Is Surat Al-Falaq the most beloved surah to Allah, and is dedicating its recitation considered part of the religion and Sunnah?

There is no evidence that Surat Al-Falaq is the most beloved surah to Allah. Rather, what has been reported is that Surat Al-Fatiha is the greatest surah in the Quran, as stated in the hadith of Ubayy ibn Ka'b in Sahih Al-Bukhari. Surat Al-Falaq is among the surahs that the Sunnah specifies for recitation at certain times, such as after prayers, before sleep, and in ruqyah. Its recitation is permissible at all times, without specific allocation unless there is a text for it.