It's definitley possible to add something like this. It would depend on what theme you are using and if you want to explore using an app or some custom code edits. Can you let me know what theme you're using, please? Some themes have built in features which display this information when you make discounts in the admin directly. Depending on what theme you're using, the discount information could be displayed in the image of the product and not below for example.
Another way this could be achieved is by using a discount app. Some apps could offer a different way of displaying the discount information. I've linked some of my favourite discount apps below:
There are more discount related apps in the Shopify App store, but these have high ratings and free plans available.
If the theme you're using doesn't display this information how you'd like or you don't want to go down the route of an app, you could hire a Shopify Expert to do this as a small task job. You can see the Shopify Expert directory here to find an Expert to work with.
If you're using the Debut theme you could be eligible to using the free 60 minutes design time from Shopify. To be eligible you need to be using a Shopify theme (you're using Debut) and be on a paid Shopify plan. If you're on a paid plan and not just the free trial then you can reach out to our support team by logging in and contacting them here. Once you're talking to an advisor, let them know what you're looking to do and they'll inform the theme support team about your request!