According to Alexander De Grand, Women Under Fascism" in The American Historical Review 19 No. 4 (1976): 947-968,

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Perhaps realizing that the vote was the single issue binding women of all political tendencies, Mussolini showed his tactical skill at disarming potential opposition. In a rapid shift he announced that the government would present a law giving the vote to women in local elections. He cleverly chose the congress of the International Alliance for Women's Suffrage, held in Rome in May 1923, as the occasion for the change in policy.3" The same guarantee was repeated to fascist women. Within the party they were promised autonomy for their organizations and a role in the directing bodies of the provincial federations. Despite these promises, women never received equal status for their organizations, which were relegated to a purely service position.32

Mussolini's assurances notwithstanding, the reality of the new government's policy was a retreat from equality. Giovanni Gentile, the minister of education, attempted to limit women teachers in predominantly male schools with the excuse that 'women do not have, nor will they ever have, either the moral or mental vigor to teach in those schools which formed the ruling class of the country '.3 In other areas of the state administration anti-feminism was the rule. (954-5, emphases added)

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So, to answer your question directly, it was a political stunt that never had any intention of being realized.