Azure DevOps will be hosted according to the location you have mentioned while creating the Azure DevOps organization.
Follow these steps to find out the location you mentioned in your organization:
Step 1: Open and sign in to Azure DevOps organization
Step 2: In the menu, click on the organization settings.
Step 3: click on overview option of organization settings
Step 4: You can find the region on the bottom of the screen
You can change the organization's location from the chat menu of organization settings.
If you are interested in Azure DevOps, you can take up this course on Azure DevOps Training by Intellipaat.
You can watch this video on Azure DevOps tutorial for beginners to have a quick start to Azure DevOps: