Latest Facebook Messenger 304 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; Vivo XI+ Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.105 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.2.0.17.118;] Android 9 Vivo XI Plus
Mozilla/5.0 (Linux; Android 9; vivo 1906 Build/PKQ1.190616.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.90 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.2.0.17.118;] Android 9 Y11
Mozilla/5.0 (Linux; Android 9; vivo 1906 Build/PKQ1.190616.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/87.0.4280.101 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.2.0.17.118;] Android 9 Y11
Mozilla/5.0 (Linux; Android 9; SM-M205FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.105 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.2.0.17.118;] Android 9 Galaxy M20
Mozilla/5.0 (Linux; Android 9; SM-J600FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.105 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.2.0.17.118;] Android 9 Galaxy J6
Mozilla/5.0 (Linux; Android 9; SM-J530F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.90 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.0.0.17.118;] Android 9 Galaxy J5 (2017)
Mozilla/5.0 (Linux; Android 9; SM-G950F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.90 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.2.0.17.118;] Android 9 Galaxy S8
Mozilla/5.0 (Linux; Android 9; SM-G950F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.90 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.0.0.17.118;] Android 9 Galaxy S8
Mozilla/5.0 (Linux; Android 9; SM-G950F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.105 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.2.0.17.118;] Android 9 Galaxy S8
Mozilla/5.0 (Linux; Android 9; SM-A705MN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.90 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.0.0.16.118;] Android 9 Galaxy A70
Mozilla/5.0 (Linux; Android 9; SM-A705FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.105 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.2.0.17.118;] Android 9 Galaxy A70
Mozilla/5.0 (Linux; Android 9; SM-A505FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.90 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.2.0.17.118;] Android 9 Galaxy A50
Mozilla/5.0 (Linux; Android 9; SM-A405FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.105 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.2.0.17.118;] Android 9 Galaxy A40
Mozilla/5.0 (Linux; Android 9; SM-A202F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/88.0.4324.181 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.0.0.17.118;] Android 9 Galaxy A20e
Mozilla/5.0 (Linux; Android 9; SM-A107F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/84.0.4147.89 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.2.0.17.118;] Android 9 Galaxy A10s
Mozilla/5.0 (Linux; Android 9; SM-A105FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.105 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.2.0.17.118;] Android 9 Galaxy A10
Mozilla/5.0 (Linux; Android 9; RMX1941 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/87.0.4280.66 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.0.0.16.118;] Android 9 C2
Mozilla/5.0 (Linux; Android 9; Redmi Note 5 Build/PKQ1.180904.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.105 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.2.0.17.118;] Android 9 Redmi Note 5
Mozilla/5.0 (Linux; Android 9; Redmi 8 Build/PKQ1.190319.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.90 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.2.0.17.118;] Android 9 Redmi 8
Mozilla/5.0 (Linux; Android 9; Redmi 7 Build/PKQ1.181021.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/88.0.4324.181 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/304.2.0.17.118;] Android 9 Redmi 7