Analyse the form of ‘Ozymandias’. Why is it considered to be a Petrarchan sonnet?

In poetry, a sonnet has 14 lines and is written in iambic pentameter. Each line has 10 syllables. It has a specific rhyme scheme and a “volta” or a specific turn.

Ozymandias is written in a sonnet with loose iambic pentameter. Iambic pentameter is pairs with 5 in a line making 10 syllables overall. An explanation for this is maybe symbolic of the broken statue itself, no longer perfect.