You must be a U.S. citizen green card holders cannot sponsor siblings.

 The I-130 approval is only the first step visa availability is based on the F4 visa category.

If your sibling is already in the U.S., they may need to wait abroad for consular processing.

 You must meet the income requirements for the Affidavit of Support From I-864.

U.S. citizens can sponsor siblings for a green card, but the process can take several years due to annual caps and long waiting times in certain categories.