Thank you for the opportunity to help you with your question!
sympatric speciation is the process through which new species get to evolve from a single ancestral species while they inhibit the same geographical region and thus the statement that "
sympatric speciation requires geographic separation" is absolutely false. On the contrally, sympatry is a term that refers to organisms that are almost identical and occur together at least in some places.
Please let me know if you need any clarification. I'm always happy to answer your questions.