Kiss: person, person, light skin tone, medium-dark skin tone emoji π§π»ββ€οΈβπβπ§πΎ is part of the People & Body and Family emojis. On some systems it can be accessed by using :kiss_tone1-4:, :couple_kiss_tone1-4:, :couplekiss_tone1-4:, :kiss_person_person_tone1_tone4: or :kiss_person_person_light_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.