Never heard the term revert in over 30 years of dealing with Indians. When on a website one needs to use the local lingo and learn it if not known. Hence the correction- useful to the OP in dealing with American English in the future.
It is not the end of a career to not get into one of the elite schools. There are many top US universities that offer excellent engineering. In fact, some public U’s are better than the ivy league schools in this. Let your child lead the way, do not push him/her into any career or choice of college here or in India. Because of my husband I know of plenty of high IQ Indians who stay in India or are here in the US in various fields. There are many paths to a happy, fulfilled, successful life. It is most important to also include a happy childhood. This means not being obsessed with getting the “very best”. There are dozens of high caliber college options in many fields for the STEM minded child.