Latest Facebook Messenger 229 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.3; es-us; SM-G710 Build/JLS36C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/Orca-Android;FBAV/229.1.0.17.118;]/FB_MEXT_IAB Android 4 Galaxy Grand 2
Mozilla/5.0 (Linux; Android 9; Redmi 7 Build/PKQ1.181021.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/77.0.3865.92 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/229.1.0.17.118;] Android 9 Redmi 7
Mozilla/5.0 (Linux; Android 8.1.0; LML414DL Build/OPM1.171019.019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/77.0.3865.92 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/229.1.0.17.118;] Android 8 Premier Pro LTE
Mozilla/5.0 (Linux; Android 8.0.0; moto e5 plus Build/OPPS27.91-179-8-2; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.162 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/229.1.0.17.118;] Android 8 Moto E5 Plus
Mozilla/5.0 (Linux; Android 6.0.1; SM-G532F Build/MMB29T; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/84.0.4147.125 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/229.1.0.17.118;] Android 6 Galaxy Grand Prime Plus
Mozilla/5.0 (Linux; Android 5.1.1; SM-J500FN Build/LMY48B; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/76.0.3809.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/229.1.0.17.118;] Android 5 Galaxy J5 (2015)
Mozilla/5.0 (Linux; Android 9; G8343 Build/47.2.A.10.107; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/76.0.3809.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/229.1.0.17.118;] Android 9 Xperia XZ1