"commendation, sanction," 1680s, from approve + -al (2). According to OED, "Rare bef. 1800; now generally used instead of" approvance (1590s, from French aprovance).
his decision merited the approval of any sensible person
although she fussed at them, she secretly viewed all her children with approval
he bought it on approval
words of approval seldom passed his lips