Magento 2.4.8 - REST API row_total does not calculate correctly (missing qty)

[dcajio]

Preconditions and environment

• Magento 2.4.8

Steps to reproduce

https://github.com/magento/magento2/commit/a93542bf15a761baa6828a31697276e904296128

Before this commit getTotalAmount($item) took into account the qty of the item because it used $item->getRowTotal(). After that commit it no longer does leading to the row_total in the REST API not accounting for qty.

Expected result

row_total in REST API would be take into account the qty of the item.

Actual result

row_total in REST API does not take into account the qty of the item.

Additional information

No response

Release note

No response

Triage and priority

• [ ] Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• [x] Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• [ ] Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• [ ] Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• [ ] Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.