Recognizing raid reconstrunction is finished

I changed on HDD in my WdMyCloud EX2-Ultra and, really incredibly, there is written nothing about how I will recognize when the RAID (1, of course) reconstruction process is finished.
I suppose by the LED status but, as it was recommended in the manual not to use my device, I had to disconnect it from the network.
This made the upper LED to be RED, of course.
I expected the HDD of the HDD1 (the one changed) should be now in yellow and, afterwards in blue, but it’s already in blue, since the very beginning of the process.
My device manual refers to the article 11007 in the knowledge base but it’s impossible to find it!
This is the usual poor experience with WD manuals and online support.
I thing that changing a defective drive should be one of the most common operations!
WD really let me down as a firm. Never again a product by them.

Hi,

You could refer to the following link: https://support-en.wd.com/app/answers/detail/a_id/15992

At least, when you give an answer, read the question.
Or the answer is: THERE IS NO CHOICE TO KNOW SUCH AN IMPORTANT THING THROUGH A STATUS LED!
A ridiculous brand with a nonexistent forum. Never again in my life!
And it took two-days-two for 1,3 Gbytes to reconstruct…