If you cannot find the Acer-specific driver, you can use a trusted third-party tool.
This post details the official methods to restore your wireless connectivity.
If you're experiencing issues with your Acer WiFi driver, try:
A missing or corrupted WiFi driver is one of the most common issues users face after upgrading Windows or performing a factory reset. Without the correct driver, your Acer computer may not detect wireless networks, or the WiFi adapter may disappear entirely from Device Manager.
There are two ways to get the driver: using the official Acer Care Center app (easiest) or the Acer Support Website (manual).