Kiss: woman, woman, dark skin tone, medium-dark skin tone emoji π©πΏββ€οΈβπβπ©πΎ is part of the People & Body and Family emojis. On some systems it can be accessed by using :kiss_woman_woman_tone5-4:, :kiss_ww_tone5-4:, :kiss_woman_woman_tone5_tone4: or :kiss_woman_woman_dark_skin_tone_medium_dark_skin_tone: shortcodes.
It was approved as part of Unicode in 2020 so it should be displayed properly on newer devices.