Welcome to the forum. Sorry no one has answered you so I will do my best to help.
First could you please clear up a few points so I make sure I have the full picture.
Am I right in assuming that this new laptop has
never been able to connect to your network wirelessly although it sees your ssid when you search for available networks?
When you connect through ethernet, you say it does connect but then the wired connection drops or doesn't reconnect at reboot.
Is there any pattern to when it loses the wired ip address...
Such as after it comes out of sleep maybe..or does it drop connection randomly?
Note: If your problem occurs when your laptop wakes from sleep please report back. It may lie in your power configuration. I'm sure that the laptop uses modern standby which causes all kinds of problems.
You have already tried some of this but maybe not in this order.
Try to connect wirelessly after each step. If you can connect after any step, you can stop.
1. Disconnect the ethernet cable and powercycle your router. Restart laptop
2. Run network troubleshooter. Settings- System-troubleshoot-other troubleshooters-Internet connections-RUN
3. Reset network adapters
This tutorial will show you how to reset network adapters in Windows 11. A network adapter (aka: Network Interface Controller (NIC) ) is a computer hardware component that connects a computer to the Internet or local area network. A network reset will remove and reinstall all your network...
www.elevenforum.com
4. Attached is
@FreeBooter .bat file which resets network components. RIGHT click on the .bat file and select run as administrator.
5. Check for file system corruption. Open a command prompt as administrator and type
sfc /scannow
After system file checker completes, make note of whether it found and corrected any problems. If found and corrected, restart
If it found problems it
could not correct, in command window type
dism /online /cleanup-image /restorehealth.
Restart
6. Change power settings for wireless adapter in Power Options. Control Panel-power options-Balanced should be checked
Next to balanced, click change plan settings
Click Change Advanced Power Settings
Expand Wireless Adapter Settings
Expand Power Saving Mode
Under Setting change it to Maximum Performance
7. Open Control Panel-device manager
Expand Network Adapters
Right click on your wireless adapter and select properties
In Power Management tab-
Uncheck 'allow the computer to turn off this device to save power'
Note: Changing these power settings uses more power, thereby affecting your battery if you use the device on battery power.
I hope one of these will help you.