I have an apparel list in Google Sheets with the following columns:
This is only a little part of it. It actually has over 9K items. So here's the thing, I have to manually search each of those legacy numbers on a HTML list provided by the client, which looks like this:
As you can see on the last column, there are some texts like "Completed", "Customer Review", etc. Those values have to be parsed on the google sheet "Status" column. After reviewing some orders and copying those values, the sheet looks like this:

Now, imagine doing this process individually with 9K+ orders, it's a pain in the ass. So I thought there could be a way to automatize this, maybe parsing the values from the HTML through some Javascript to a CSV or anything similar. I've been doing some research but haven't found anything. I'm not asking you to do the job for me. I'm looking for a hint to start this correctly, as it would make a lot easier and faster the work.
Note: this "automatization" isn't a task or job requested to me, I'm a designer (with some programming background) and I have to do the manual process with a deadline, so I thought I could try and speed up this.
Thanks in advance.
I would try using IMPORTHTML so you can add the data from the HTML list on a different tab in Google sheets and then perform an INDEX MATCH or an ArrayFormula to get the data that you need.
There are many ways to compare the data that you need using different formulas, if you can create a demo sheet we could help you finding a formula that could perform the query of the data that you need. As a friendly reminder always try to include a minimal example that reproduces the issue. That way we can provide better insights about what you want to achieve.