In this study, we demonstrate for the first time the mmWave performance of a thin-film metal-ferroelectric-metal (MFM) varactor utilizing (HfO2/ZrO2)4 superlattice (SL), integrated into the Back-End-of-Line (BEoL) of 180 nm HV SOI technology. At low frequencies, the varactor exhibits tunability of 28.9% and 24% before and after wake-up cycling, respectively, using voltage sweeps ranging from -2.4 V to 1 V. During mmWave characterization spanning from 1 GHz to 60 GHz, the device demonstrates consistent tunability of 19.6%-18.8% and 17% - 15.7% before and after wake-up, respectively. Moreover, comparison with a standard Hf0.5 Z r0.5O2 (HZO) varactor, integrated within a similar technology, reveals the superior performance of superlattice-based varactor, highlighting its immense potential for mmWave applications.