Latest Facebook 401 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; ZTE A2019G Pro Build/PKQ1.181203.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.64 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 Axon 9 Pro
Mozilla/5.0 (Linux; Android 9; ZTE A2019G Pro Build/PKQ1.181203.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/109.0.5414.86 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 Axon 9 Pro
Mozilla/5.0 (Linux; Android 9; ZTE A2019G Pro Build/PKQ1.181203.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/109.0.5414.118 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 Axon 9 Pro
Mozilla/5.0 (Linux; Android 9; ZT216_1 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/77.0.3865.92 Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 ZT216
Mozilla/5.0 (Linux; Android 9; Z6621O Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/109.0.5414.117 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 Optus X Vista
Mozilla/5.0 (Linux; Android 9; YK_P30 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.65 Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 YK P30
Mozilla/5.0 (Linux; Android 9; YK_P30 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.64 Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 YK P30
Mozilla/5.0 (Linux; Android 9; YK_P30 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/109.0.5414.117 Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 YK P30
Mozilla/5.0 (Linux; Android 9; Y9Plus 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/401.0.0.24.77;] Android 9 Y9 Plus
Mozilla/5.0 (Linux; Android 9; Y8 Plus Build/P00610; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/109.0.5414.118 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 Y8 Plus
Mozilla/5.0 (Linux; Android 9; X2_euro 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/401.0.0.24.77;] Android 9 X2
Mozilla/5.0 (Linux; Android 9; X19 S Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.85 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 X19 S
Mozilla/5.0 (Linux; Android 9; X19 S Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.64 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 X19 S
Mozilla/5.0 (Linux; Android 9; X19 S Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/109.0.5414.117 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 X19 S
Mozilla/5.0 (Linux; Android 9; WP7 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/401.0.0.24.77;] Android 9 WP7
Mozilla/5.0 (Linux; Android 9; W109 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/109.0.5414.118 Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 W109
Mozilla/5.0 (Linux; Android 9; W-U300 Build/P00610; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.63 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 Ride
Mozilla/5.0 (Linux; Android 9; vivo Z1i Build/PKQ1.180819.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 Z1i
Mozilla/5.0 (Linux; Android 9; vivo Z1 Build/PKQ1.180819.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.85 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 Z1
Mozilla/5.0 (Linux; Android 9; vivo 1813 Build/PKQ1.181016.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/108.0.5359.128 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/401.0.0.24.77;] Android 9 Nex Dual Display