Is boric acid a protonic acid why it doesnt a protonic acid

Sir,

   Boric Acid/orthoboric acid is H₃BO₃ or B(OH)₃.It is monobasic and a weak acid.It doesn’t liberate hydrogen ion but accepts hydroxyl ion from water and thus behaves as a lewis acid.Thus,It indirectly contributes to the formation of hydrogen ion.

H₃BO₃  + H₂O ---->H⁺  +B(OH)₄^-

It is not a protic acid because it does not ionize in H20 to give proton. It acts as a Lewis acid by accepting electrons from a hydroxyl ion of water and in turn release H+ ion.