Mustahabb and Sunnah

What is really disturbing is the great negligence and the clear and widespread failure to follow the Sunnah, etiquette and mustahabb of the law of the Seal of the Prophets, Muhammad, may God bless him and his family and grant them peace.
This neglect is reprehensible, especially since the believer has a characteristic, appearance, approach, and behavior that distinguishes him from other people, and by which the Muslim is known from other people... It is represented by voluntary adherence, an internal motive, and a sincere desire, to the Sunnah of the Messenger of God, may God’s prayers and peace be upon him and his family, as an expression of his love and adoration for the Chosen One. To do what he was doing in terms of actions and words.
But if Muslims do not abide by these Sunnahs, then who should abide by them, and who will revive them after their death?
I was terrified to see around us religious people who do not abide by these Sunnahs, but most of them are ignorant of them!