Here’s how you can create Environment Variables in Power Apps or Power Automate portal.

Creating Environment Variable in a Solution

First, create Solution to store your environment variable.

1. In this example, I’m using Power Apps (https://make.powerapps.com/) to create a n Environment Variable.
   In the Solution, I can click on New and then look for an Environment variable.
   
   
2. Below are the types of Environment variables which you can create –
   
   
   
3. For example, I’m storing the current Org’s ID in an Environment Variable which I want to re-use in my Flow for whatever purpose (Just an example 🙂).
   I’ve given it a suitable name and stored the current value as well.
   
   
4. And my Environment Variable will be created in a Solution in either Power Apps or Power Automate.
   
   
5. Now that your Environment variable is ready, you can feel free to use it in Power Automate and Power Apps. Environment variables can be used in Flows and Canvas Apps which are in a solution.
   Here’s how you can use Environment Variables in Canvas Apps and Flow – Using Environment Variables in Power Automate and Canvas Apps

You can look at Microsoft’s Documentation on Environment Variables for more info – https://learn.microsoft.com/en-us/power-apps/maker/data-platform/environmentvariables?WT.mc_id=DX-MVP-5003911

Hope this was useful!

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Thank you!