Latest Facebook Lite 191 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; TECNO KC8 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.149 Mobile Safari/537.36[FBAN/EMA;FBLC/en_US;FBAV/191.0.0.7.122;] Android 9 Spark 4
Mozilla/5.0 (Linux; Android 9; SM-G950F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.149 Mobile Safari/537.36[FBAN/EMA;FBLC/bg_BG;FBAV/191.0.0.7.122;] Android 9 Galaxy S8
Mozilla/5.0 (Linux; Android 7.0; Redmi Note 4 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.149 Mobile Safari/537.36[FBAN/EMA;FBLC/ru_RU;FBAV/191.0.0.7.122;] Android 7 Redmi Note 4