Wifi sharing from Android Automotive OS to Embedded Linux - Android Q&A, Help & Troubleshooting

We have a structure running Android Automotive OS and Embedded Linux on Hypervisor.
Wi-fi(wlan0) connection is on Android Automotive OS(Guest Domain), and we want to share to the Embedded Linux(Main Domain).
Our network topology for this process is as follows.
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We followed these steps below while making these connections:
Main Domain
Code:
1) ifconfig eth0 down
2) ip link add name br0 type bridge
3) ip link set br0 up
Create Guest Domain
Guest Domain
Code:
1) ifconfig eth0 down
2) ifconfig eth0 192.168.X.1/24 up
3) sysctl -w net.ipv4.ip_forward=1
4) iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE
After completing the steps in the Guest Domain, it was returned to the Main Domain and the following commands were run.
Main Domain
Code:
1) ip address add 192.168.X.104/24 dev br0
2) ifconfig vif1.0 down
3) ifconfig vif1.0 192.168.X.105/24 up
4) ip route add default via 192.168.X.1 dev br0
"8.8.8.8" was pinged from Main Domain, but internet connection could not be established.
All interfaces in Main Domain can ping all interfaces(eth0, wlan0) in Guest Domain. Likewise, all interfaces in the Main Domain can be pinged from the Guest Domain (vif1.0, br0)
In the case of both domains are Embedded Linux, the same steps were followed and the Internet sharing process was made from the Guest Domain to the Main Domain and the Internet was successfully accessed from the Main Domain.
While the Guest Domain is Android Automotive OS, internet access cannot be provided from main domain.
I would be very grateful if you could guide me on this,
Regards.