Latest Facebook Messenger 397 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; V1930A Build/PKQ1.190616.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.65 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 9 Y3 Standard
Mozilla/5.0 (Linux; Android 9; BUZZ 2 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.153 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 9 Buzz 2
Mozilla/5.0 (Linux; Android 8.1.0; DUB-LX3 Build/HUAWEIDUB-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/111.0.5563.116 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 8 Y7 (2019)
Mozilla/5.0 (Linux; Android 8.1.0; DRA-LX2 Build/HUAWEIDRA-LX2; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/101.0.4951.41 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 8 Y5 Prime (2018)
Mozilla/5.0 (Linux; Android 8.1.0; CPH1909 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/103.0.5060.71 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 8 A5S
Mozilla/5.0 (Linux; Android 8.1.0; BUZZ 1 Build/OPM2.171019.012; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 8 Buzz 1
Mozilla/5.0 (Linux; Android 7.1.1; OPPO A79 Build/N6F26Q; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.154 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 7 A79
Mozilla/5.0 (Linux; Android 7.0; BV7000 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.65 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 7 BV7000
Mozilla/5.0 (Linux; Android 6.0; PGN610 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/95.0.4638.74 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 6 Plume P8 Lite
Mozilla/5.0 (Linux; Android 4.4.4; vivo Y627 Build/KTU84P) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/33.0.0.0 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 4 Y627
Mozilla/5.0 (Linux; Android 13; SM-N986U Build/TP1A.220624.014; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.65 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 13 Galaxy Note 20 Ultra 5G
Mozilla/5.0 (Linux; Android 13; SM-M625F Build/TP1A.220624.014; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.154 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 13 Galaxy M62
Mozilla/5.0 (Linux; Android 13; 2203129G Build/TKQ1.220807.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.65 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 13 12 Lite
Mozilla/5.0 (Linux; Android 12; V2117 Build/SP1A.210812.003; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.65 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 12 Y75
Mozilla/5.0 (Linux; Android 12; V2060 Build/SP1A.210812.003; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/91.0.4472.114 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 12 Y72 5G
Mozilla/5.0 (Linux; Android 12; V2037 Build/SP1A.210812.003; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/91.0.4472.114 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 12 Y20G
Mozilla/5.0 (Linux; Android 12; RMX3690 Build/SP1A.210812.016; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/102.0.5005.125 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 12 C30s
Mozilla/5.0 (Linux; Android 12; Infinix X665E Build/SP1A.210812.016; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/103.0.5060.129 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 12 Hot 20i
Mozilla/5.0 (Linux; Android 12; 21091116AC Build/SP1A.210812.016; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/103.0.5060.129 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 12 Redmi Note 11 5G
Mozilla/5.0 (Linux; Android 11; ZTE 7540N Build/RP1A.200720.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/108.0.5359.128 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/397.0.0.20.81;] Android 11 Blade A72 5G