Latest Facebook 491 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; MRD-LX1F Build/HUAWEIMRD-LX1F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.78 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;] Android 9 Y6 (2019)
Mozilla/5.0 (Linux; Android 10; JNY-LX1 Build/HUAWEIJNY-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/114.0.5735.196 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;] Android 10 P40 Lite
Mozilla/5.0 (Linux; Android 14; V2332 Build/UP1A.231005.007; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/145.0.7632.120 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;] Android 14 Y03
Mozilla/5.0 (iPhone; CPU iPhone OS 18_6_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22G100 [FBAN/FBIOS;FBAV/491.1.0.62.114;FBBV/667691447;FBDV/iPhone12,1;FBMD/iPhone;FBSN/iOS;FBSV/18.6.2;FBSS/2;FBID/phone;FBLC/it_IT;FBOP/5;FBRV/670791505;IABMV/1] iOS 18 iPhone 11
Mozilla/5.0 (Linux; Android 10; BE2011 Build/QKQ1.200719.002; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.78 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;] Android 10 Nord N100
Mozilla/5.0 (Linux; Android 15; Infinix X6725 Build/AP3A.240905.015.A2; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/145.0.7632.120 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;] Android 15 Note 12 VIP
Mozilla/5.0 (Linux; Android 9; ZTE Blade A7s Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.78 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;IABMV/1;] Android 9 Blade A7s
Mozilla/5.0 (Linux; Android 9; ZTE Blade 10 Vita Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/127.0.6533.103 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;] Android 9 Blade 10 Vita
Mozilla/5.0 (Linux; Android 9; Z6201V Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.78 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;IABMV/1;] Android 9 Blade A7
Mozilla/5.0 (Linux; Android 9; vivo X21i Build/P00610; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.78 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;IABMV/1;] Android 9 X21i
Mozilla/5.0 (Linux; Android 9; vivo 1725 Build/PKQ1.180819.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.78 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;IABMV/1;] Android 9 X21
Mozilla/5.0 (Linux; Android 9; VIA_E3 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.78 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;IABMV/1;] Android 9 VIA E3
Mozilla/5.0 (Linux; Android 9; V1945A Build/PKQ1.190626.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.78 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;] FBNV/5 Android 9 Y9s
Mozilla/5.0 (Linux; Android 9; V1945A Build/PKQ1.190626.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.78 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;] Android 9 Y9s
Mozilla/5.0 (Linux; Android 9; V1945A Build/PKQ1.190626.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.78 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;IABMV/1;] FBNV/5 Android 9 Y9s
Mozilla/5.0 (Linux; Android 9; UMIDIGI X Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.78 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;] Android 9 X
Mozilla/5.0 (Linux; Android 9; U693CL Build/U693CL_01.02.05; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.78 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;] FBNV/5 Android 9 UMX U693CL
Mozilla/5.0 (Linux; Android 9; Trekker-X4 Build/PKQ1.190414.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.78 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;] Android 9 Trekker-X4
Mozilla/5.0 (Linux; Android 9; Trekker-X4 Build/PKQ1.190414.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.78 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;IABMV/1;] FBNV/5 Android 9 Trekker-X4
Mozilla/5.0 (Linux; Android 9; Trekker-X4 Build/PKQ1.190414.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.78 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/491.0.0.58.78;IABMV/1;] Android 9 Trekker-X4