Latest Facebook Messenger 237 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 8.0.0; SM-G930V Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/237.0.0.11.108;] Android 8 Galaxy S7
Mozilla/5.0 (Linux; Android 8.0.0; Mi MIX 2 Build/OPR1.170623.027; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.62 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/237.0.0.11.108;] Android 8 Mi Mix 2
Mozilla/5.0 (Linux; Android 7.1.2; Redmi 5A Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.158 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/237.0.0.11.108;] Android 7 Redmi 5A
Mozilla/5.0 (Linux; Android 6.0.1; vivo Y55A Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/51.0.2704.81 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/237.0.0.11.108;] Android 6 Y55
Mozilla/5.0 (Linux; Android 5.1; A1601 Build/LMY47I; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/77.0.3865.116 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/237.0.0.11.108;] Android 5 F1s
Mozilla/5.0 (Linux; Android 10; SNE-LX3 Build/HUAWEISNE-L23; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.96 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/237.0.0.11.108;] Android 10 Mate 20 Lite