It's possible that she copy-pastes her own signature, but this is evidence in favor of the Cybertruck incident being a hoax.
The Cybertruck letter also lists her as "Sr. Director and Deputy General Counsel". But her LinkedIn page lists "Deputy General Counsel & Director, Infrastructure & CapEx" as a previous title; her current title is listed as "VP, Legal": https://www.linkedin.com/in/dinna-eskin-743a7435/