Make rooted device search for Wi-Fi connections more often

The hardware:

• Dicola CHS7047X Android 8.0 MTCE car head unit (rooted)
• This generic 4G USB dongle

The 4G dongle acts as a Wi-Fi hotspot and is always on.

When I turn my car on, the head unit doesn't have to boot Android from fresh; it appears almost immediately.

However, I can't access the Internet for the first 30-60 seconds each time as it's not connected to the Wi-Fi hotspot.

Is there a way to make Android scan every 3-5 seconds until a connection is made to a Wi-Fi connection?