There is no “screen time” on my I phone ES under settings

That’s because you have iOS 11 on it. So it probably is an iPhone 5, not an SE. Go to Settings/General/About and check the model name. If it is an SE you will have to update it to iOS 14.

That’s because Screen Time was added in iOS 12, and you have iOS 11. You will have to update to iOS 14 (as you can only update to the latest version) to enable Screen Time.