No. Funding a petition does not create a family immigration benefit. Derivative status reaches an eligible spouse and unmarried children under 21, judged on the facts of each case, with age protection that is fact-specific and never a promised outcome. Your brother would need an independent basis of their own.
Separating the donor from the derivative applicants
Two different questions get confused here. One is whose money it is, which the gift documentation answers. The other is who immigrates, which the statute answers. A hypothetical investor with a spouse and a 19-year-old daughter would list those two as derivatives; the brother appears only in the source-of-funds evidence. Each family member is assessed individually for admissibility at the appropriate stage.
The investor’s spouse is excluded as a qualifying EB-5 worker. Project value does not replace the principal’s or derivatives’ immigration requirements. Review the Visa Bulletin and Child Status Protection Act rules as applicable. After immigrant processing, the investor, spouse, and unmarried children under 21 receive two-year conditional residence, and Form I-829 is tied to the period before its second anniversary.