Is wearing a necktie (cravat) considered a forbidden garment of fame, especially given that it is not widespread in the neighborhood where the questioner lives?

A necktie is not a garment of ostentation, due to its prevalence in Muslim countries. A garment of ostentation is that which deviates from people's customs and makes its wearer conspicuous, becoming a cause for backbiting and people incurring sin by backbiting about him. The prohibition of garments of ostentation is out of fear of falling into backbiting. Contradicting people's customs in dress is disliked because it involves ostentation.