Unable to connect to Hotspot on Windows using Mac

Hi,

What kind of connection are you trying to use?

The following articles might be of interest, at least in applicable parts.

Share your internet connection from iPhone – Apple Support (UK)

How to set up a Personal Hotspot on your iPhone or iPad - Apple Support

If Personal Hotspot is not working on your iPhone or iPad (Wi-Fi + Cellular) - Apple Support

Via Wi-Fi?

First of all, make sure that Personal Hotspot is available with your carrier (mobile network provider).

Also, please take a closer look at the articles above; they should provide you with information about how to connect.