Latest Facebook 406 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; ZTE Blade A7s Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/111.0.5563.58 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Blade A7s
Mozilla/5.0 (Linux; Android 9; ZTE Blade A7s Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/111.0.5563.57 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Blade A7s
Mozilla/5.0 (Linux; Android 9; ZTE Blade A7s Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/111.0.5563.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Blade A7s
Mozilla/5.0 (Linux; Android 9; ZTE Blade A7s Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.63 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Blade A7s
Mozilla/5.0 (Linux; Android 9; ZTE Blade A3 Lite 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/FB4A;FBAV/406.0.0.26.90;] Android 9 Blade A3 Lite
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/111.0.5563.58 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Blade 10 Vita
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/111.0.5563.57 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Blade 10 Vita
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/111.0.5563.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Blade 10 Vita
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/110.0.5481.153 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Blade 10 Vita
Mozilla/5.0 (Linux; Android 9; ZTE A2019G Pro Build/PKQ1.181203.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/111.0.5563.58 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Axon 9 Pro
Mozilla/5.0 (Linux; Android 9; Z6621O Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/111.0.5563.58 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Optus X Vista
Mozilla/5.0 (Linux; Android 9; Z6621O Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/109.0.5414.118 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Optus X Vista
Mozilla/5.0 (Linux; Android 9; Z6621O Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/103.0.5060.129 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Optus X Vista
Mozilla/5.0 (Linux; Android 9; Z6201V Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/111.0.5563.58 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Blade A7
Mozilla/5.0 (Linux; Android 9; Z6201V Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/111.0.5563.57 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Blade A7
Mozilla/5.0 (Linux; Android 9; Z6201V Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/111.0.5563.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Blade A7
Mozilla/5.0 (Linux; Android 9; Z6201V Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/111.0.5563.115 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Blade A7
Mozilla/5.0 (Linux; Android 9; Z5151V Build/PKQ1.190924.002; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/111.0.5563.58 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Visible R2
Mozilla/5.0 (Linux; Android 9; Z3351S Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/111.0.5563.58 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Quest 5
Mozilla/5.0 (Linux; Android 9; Z3351S Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/111.0.5563.57 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/406.0.0.26.90;] Android 9 Quest 5