iphone 13 mini hotspot sharing with win 7 Desktop through USB cable? No massage for trust, however my USB cable is OK as it shares photo

1. Go to Settings, then tap General.
2. Tap Transfer or Reset [Device].
3. Tap Reset, then tap Reset Location & Privacy. 

Now when you connect your device to computers, the alert message will ask you whether you trust that computer. 

Please see the pic below to make it clearer that Hotspot is enabled by a Carrier on one SIM and not by the other Carrier in the same iPhone (Dual SIM).

Use these steps first

Restart the iPhone or iPad that provides Personal Hotspot and the other device that needs to connect to Personal Hotspot. Make sure that you have the latest version of iOS. On the iPhone or iPad that provides Personal Hotspot, go to Settings > General > Reset, then tap Reset Network Settings.

If Personal Hotspot is not working on your iPhone or iPad (Wi-Fi

Also, check the following

1. Network coverage and stability
2. Data Balance
3. On your windows (See if WiFi Auto Joins is enabled)
4. Also, check if you have any stronger WiFi signal around your computer.

Ask the Carrier to change the SIM if nothing works.