Does dedicating certain foods in Ramadan, such as "knafeh" and "qatayef," fall under the category of Bidʻah (innovation) and make consuming them unlawful in this month, as opposed to others?

Designating certain foods, such as sweets, for the month of Ramadan by some people is not considered an innovation (bid'ah), because it falls under the category of custom, not an act of drawing closer to Allah. Innovation is the introduction of new practices into the religion, such as committing to specific acts of worship at times not prescribed by Sharia. As for customs, the general rule concerning them is permissibility unless there is evidence to prohibit them, and they do not fall under the category of Sharia-defined innovation.