Latest Facebook Messenger 235 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; VOG-L29 Build/HUAWEIVOG-L29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/77.0.3865.92 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/235.1.0.9.122;] Android 9 P30 Pro
Mozilla/5.0 (Linux; Android 8.1.0; SM-J415G Build/M1AJQ; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/77.0.3865.92 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/235.1.0.9.122;] Android 8 Galaxy J4+
Mozilla/5.0 (Linux; Android 6.0.1; Lenovo YT3-X50F Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/77.0.3865.92 Safari/537.36 [FB_IAB/Orca-Android;FBAV/235.1.0.9.122;] Android 6 Yoga Tab 3