Peak 2022–2023 Douyin/livestream slang. Livestream hosts address viewers as 家人们 ('family'), then 谁懂啊 ('who gets it?!') as a dramatic hook before spilling something mundane. Tone is half-ironic — best used playfully in casual online posts.
culture
Part of a cluster of 'livestream voice' phrases (直播间话术) that escaped onto general social media: 宝子们 (babies), 家人们 (fam), 谁懂啊 (who gets it).