[تم الحل] How can I change an old development subdomain WMPL to a new production domain one

HI, I have tried before to solve this issue, but you did not help me properly

Please, I need to check that everything is good on a migratio action. And also, I need to know how can I change an old development subdomain WMPL to a new production domain one

I think I did everything good, but do not understand which is the next step