This mini-guide provides a structural approach to troubleshoot and fix the issue.

Verify your network controller model (Intel, Broadcom, Realtek).
Ensure the correct kext (e.g., AirportItlwm or BrcmPatchRAM) is loaded in your config.
Clear network interfaces and reset NVRAM if changes don't apply.

Reboot and verify if the functionality is restored and stable under typical usage.

OpenCore-EFI-Laptop-Lenovo-Yoga-C740-14IML

Stable and self-use OpenCore EFI files for Lenovo Yoga C740-14IML.

Details of the PC used in debugging

Items	Model
Laptop	Lenovo YOGA C740-14IML
Motherboard	Lenovo (Unknown)
CPU	Intel Core i5-10210U
RAM	SK Hynix 8G*2 2667 MHz
Hard Disk	WDC PC SN730 SDBPNTY-512G-1101 512G M.2 NVMe SSD
GPU	Intel Graphics UHD 630
Sound Card	Realtek ALC285 & Intel SST
Ethernet	Realtek USB GbE Family Controller
WLAN	Intel Wi-Fi 6 AX201 160MHz
Monitor	Lenovo Display FHD

~~Stuck on [ PCI configuration end, bridges 2, devices 20 ]~~
Resolved after making the SSDTs in right order.
~~Stuck on apfs_module_start... Previous shutdown cause...~~
Not problems of EFI, resolved after reflash the USB Installer.
~~Stuck on IOG flags ... Generation from SMC report as ... IOPPF ...~~
Resolved after fixing SSDTs, adding some kernel extensions, etc.
The touch screen ~~failed to drive~~ is not stable during using
Resolved after switching to SSDT-XOSI, adding patching of XOSI, patching VoodooI2CPCIController.cpp (thanks @MJYINMC), but touch screen ~~still doesn't work~~ only work after a sleeping.
~~Sound Card failed to drive~~
AppleALC.kext with layout-id 61 is OK.
~~Unable to enter macOS 11.0.1 Installer (Whether it is in-system upgrade or USB upgrade)~~
It's able to update if you set DVMT pre-allocated by PATCHING BIOS (not set in OpenCore's config.plist). See here for the instructions and thanks @MJYINMC
Built-in microphone failed to drive
Wi-Fi cannot run at full speed