Latest Facebook Lite 197 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 8.1.0; W_K300 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.138 Mobile Safari/537.36[FBAN/EMA;FBLC/fr_FR;FBAV/197.1.0.17.125;] Android 8 Jerry 3
Mozilla/5.0 (Linux; Android 8.1.0; Sunny3 Build/OPM2.171019.012; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.138 Mobile Safari/537.36[FBAN/EMA;FBLC/fr_FR;FBAV/197.1.0.17.125;] Android 8 Sunny 3
Mozilla/5.0 (Linux; Android 8.1.0; Sunny3 Build/OPM2.171019.012; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36[FBAN/EMA;FBLC/fr_FR;FBAV/197.1.0.17.125;] Android 8 Sunny 3
Mozilla/5.0 (Linux; Android 8.1.0; DRA-LX5 Build/HUAWEIDRA-LX5; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36[FBAN/EMA;FBLC/en_US;FBAV/197.1.0.17.125;] Android 8 Y5 Lite
Mozilla/5.0 (Linux; Android 7.1.1; SM-J250M Build/NMF26X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.138 Mobile Safari/537.36[FBAN/EMA;FBLC/es_ES;FBAV/197.1.0.17.125;] Android 7 Galaxy J2 Pro
Mozilla/5.0 (Linux; Android 6.0; Lenovo A2016a40 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36[FBAN/EMA;FBLC/ru_RU;FBAV/197.1.0.17.125;] Android 6 Vibe B
Mozilla/5.0 (Linux; Android 6.0.1; SM-J500M Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.138 Mobile Safari/537.36[FBAN/EMA;FBLC/es_LA;FBAV/197.1.0.17.125;] Android 6 Galaxy J5 (2015)