Generally, it takes about a month for the external examination of graduate papers to produce results. It may take about two weeks at the earliest, but I've seen amendments that haven't been answered for more than two months, mainly depending on the professional level and time of the paper review experts. If they are busy, they may delay for a long time, but they will usually send you the paper review opinions before the deadline for your defense.
It usually takes one to three months for the external review of small papers in C journals. External audit is also a step of audit. In the process of audit, there may be differences. At this time, external audit is needed to audit. External audit experts are experts in related fields outside the editorial department. It may be more intuitive if an external auditor checks the paper. If the paper passes the review, it means that the paper is not far from publication, so the author should not be nervous when auditing externally.
External audit takes some time. Generally, external audit takes one to three months, and the audit time is not absolute. If it goes well, it may come down in more than a month. It's a matter of time. The process of publishing the paper is complicated, and there are many problems that need attention, so we should pay more attention according to the actual situation.