The WES certificate is not mandatory as they use the reference number to verify with WES. However, its advisable to just submit it together with your certificates and IELTS report.
All the best
Hello, my Wes certificate hasn't arrived yet.
Are you saying when I get ITA before it arrives , I can go ahead and upload the PDF format given to me on my WES profile? because my evaluation has been completed. Since I haven't gotten the cert yet