Some options for how to include the Level AAA SCs:
Add the Level AAA SC in the correct order, interleaved with the existing Level A and AA
Add in the Level AAA SC under a new Level AAA section, potentially with some context that these aren't required by current regulations (or by repeating what's in WCAG regarding Level AAA). See Note 2 in the WCAG 2.2 Conformance Level section.
Some options for how to include the Level AAA SCs: