From your words, I don’t understand where this field should be, in the frontend or backend. If you need this field in the frontend, then how to understand which user agreed to the condition?
Please specify the task in more detail.
For most digital agencies and their clients, the biggest issue is getting enough sales. You must focus on the proper techniques to convert visitors into leads, customers, and subscribers. It’s getting much harder to do nowadays because there are so many competitors.