Kiss: woman, woman, medium-dark skin tone, medium skin tone emoji π©πΎββ€οΈβπβπ©π½ is part of the People & Body and Family emojis. On some systems it can be accessed by using :kiss_woman_woman_tone4-3:, :kiss_ww_tone4-3:, :kiss_woman_woman_tone4_tone3: or :kiss_woman_woman_medium_dark_skin_tone_medium_skin_tone: shortcodes.
It was approved as part of Unicode in 2020 so it should be displayed properly on newer devices.