Hey @Shazia
Click on the three dots on right, check if the flow is turned off or not. If it is turned off, turn it on, then your run button will open.
If still you have this problem, maybe not sure, someone might have removed your name from security to run the flow.
If this answer helps you, mark it as a solution. And if you liked the explanation, you can give a thumbs up. It really helps. Thanks. 🙂
