unable to set the monitor mode on my awus036ach

[cebwon]

I try many times with many drivers to set my alfa wifi adaptater on monitor mode. But When i try with iw i get a weird error and when i try with airmon-ng, It says "monitor mode enabled" however when i type iwconfig my alfa is still in managed mode. I also tried with airodump-ng without successe. Here are my command :
┌──(cebwon㉿kayzon)-[~]
└─$ iwconfig
lo no wireless extensions.

wlan0 IEEE 802.11 Mode:Monitor Frequency:2.412 GHz Tx-Power=3 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on

wlan1 unassociated Nickname:"WIFI@REALTEK"
Mode:Managed Frequency=2.412 GHz Access Point: Not-Associated
Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Power Management:off
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

┌──(cebwon㉿kayzon)-[~]
└─$ sudo airmon-ng check kill

┌──(cebwon㉿kayzon)-[~]
└─$ sudo ifconfig wlan1 down

┌──(cebwon㉿kayzon)-[~]
└─$ sudo iw dev wlan1 set type monitor
command failed: Operation not supported (-95)

┌──(cebwon㉿kayzon)-[~]
└─$ sudo airmon-ng start wlan1

PHY Interface Driver Chipset

phy0 wlan0 mt7921e MEDIATEK Corp. MT7921 802.11ax PCI Express Wireless Network Adapter
phy1 wlan1 8812au Realtek Semiconductor Corp. RTL8812AU 802.11a/b/g/n/ac 2T2R DB WLAN Adapter
(monitor mode enabled)

┌──(cebwon㉿kayzon)-[~]
└─$ iwconfig
lo no wireless extensions.

wlan0 IEEE 802.11 Mode:Monitor Frequency:2.412 GHz Tx-Power=3 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on

wlan1 unassociated Nickname:"WIFI@REALTEK"
Mode:Managed Frequency=2.412 GHz Access Point: Not-Associated
Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Power Management:off
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

┌──(cebwon㉿kayzon)-[~]
└─$