Kiss: person, person, medium-light skin tone, medium skin tone emoji π§πΌββ€οΈβπβπ§π½ is part of the People & Body and Family emojis. On some systems it can be accessed by using :kiss_tone2-3:, :couple_kiss_tone2-3:, :couplekiss_tone2-3:, :kiss_person_person_tone2_tone3: or :kiss_person_person_medium_light_skin_tone_medium_skin_tone: shortcodes.
It was approved as part of Unicode in 2020 so it should be displayed properly on newer devices.