Hello everyone! I have a workflow that shows it updated the Approval Status of my Journal Entry, unfortunately, this change is not reflected on the Journal Entry transaction(main line). Any ideas on what caused this issue?

do you have any other approval routing enabled? Suite Approvals?

If your JE has an AP or AR account, check if AP or AR is locked for the Period and Subsidiary. I have encountered this before, where the workflow silently failed. If you check the record, it shows that the record moved to the next workflow state but the fields that were supposed to be updated are not updated.