The pattern of weight loss - how much you lose and when - is not a significant factor for weight regain.
It’s a simple fact that when you stop whatever you are doing to lose/maintain weight, you will start gaining weight back.
Many people lost weight, only to regain it again because they went back to eating foods that made them overweight or obese before. That is the main reason for weight loss/regain cycle.
The pattern of weight loss is very important during weight loss attempts. When you see the results early in the process, you gain more confidence that what you are doing is working and it will motivate you to continue.