Immigration clause on relatives of American immigrants

Yes, but not directly. The process is rather troublesome and long.

ask your cousin to apply for your uncle first, and then apply for your mother after your uncle arrives in the United States and becomes an American citizen.

I can apply for you when your mother becomes an American citizen again.

it will take about 3-4 years to complete this process.

Specifically: your cousin applied for your uncle-2 years,

your uncle became an American citizen-5 years,

your uncle applied for your mother-12 years,

your mother became an American citizen-5 years,

your mother applied for you-1 years.