Latest Facebook 258 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; vivo 1904 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 Y12
Mozilla/5.0 (Linux; Android 9; UMIDIGI X Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/85.0.4183.101 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 X
Mozilla/5.0 (Linux; Android 9; ULTRAMINTT Y3 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.136 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 UltraMintt Y3
Mozilla/5.0 (Linux; Android 9; TECNO KB7j Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.136 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 Spark 3
Mozilla/5.0 (Linux; Android 9; TECNO CB7 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.117 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 Camon i4
Mozilla/5.0 (Linux; Android 9; TA-1021 Build/PKQ1.181105.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.121 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 6
Mozilla/5.0 (Linux; Android 9; TA-1020 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/94.0.4606.85 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 3
Mozilla/5.0 (Linux; Android 9; TA-1020 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.119 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 3
Mozilla/5.0 (Linux; Android 9; STF-L09 Build/HUAWEISTF-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.119 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 Honor 9
Mozilla/5.0 (Linux; Android 9; Stella Omega Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.136 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 Stella Omega
Mozilla/5.0 (Linux; Android 9; SM-J400F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.121 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 Galaxy J4
Mozilla/5.0 (Linux; Android 9; SM-A530F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/90.0.4430.210 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 Galaxy A8
Mozilla/5.0 (Linux; Android 9; SM-A505FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/87.0.4280.101 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 Galaxy A50
Mozilla/5.0 (Linux; Android 9; SM-A307FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.136 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 Galaxy A30s
Mozilla/5.0 (Linux; Android 9; Redmi Note 8 Build/PKQ1.190616.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 Redmi Note 8
Mozilla/5.0 (Linux; Android 9; POT-LX1 Build/HUAWEIPOT-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/91.0.4472.120 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 P smart (2019)
Mozilla/5.0 (Linux; Android 9; POT-LX1 Build/HUAWEIPOT-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.136 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 P smart (2019)
Mozilla/5.0 (Linux; Android 9; moto z3 Build/PDXS29.84-51-6; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/73.0.3683.90 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 Moto Z3
Mozilla/5.0 (Linux; Android 9; moto g(7) optimo maxx(XT1955DL) Build/PPOS29.114-134-16; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.119 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 Moto G7 Optimo Maxx (XT1955DL)
Mozilla/5.0 (Linux; Android 9; moto g(7) optimo maxx(XT1955DL) Build/PPOS29.114-134-13; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/73.0.3683.90 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/258.0.0.34.119;] Android 9 Moto G7 Optimo Maxx (XT1955DL)