I am just starting the transition of moving permanently to the PIs. You can not even start the process from an embassy in the United States. You must present the filled out form in person and pay the fees. Have to go there first and apply at the BI and probably use the PRA to help. This is from research I have done yesterday, may 13 2021. I can't even reach the embassy in San Fran. Nobody will answer a phone and nobody responds to emails. The latest I have read about the Tourism and immigration bureaus is that they are operating on skeleton crews.