When do you usually start feeling the effects of weight loss injections?

I have started managing my weight recently and am combining diet and exercise, but controlling my appetite is harder than I thought, so I am looking into weight loss injections. I became interested because many people around me have talked about them, and I was curious to see what kind of results I could actually expect.

What I am most curious about is when the effects of the weight loss injections start to appear. I am wondering if there are people whose appetite decreases immediately after the first injection, or if it is common to feel changes after a few weeks.

I would also like to know if getting weight loss injections simply reduces appetite, or if the effects manifest as a longer-lasting feeling of fullness or less cravings for snacks. Since everyone's weight and lifestyle are different, I expect the actual amount of weight loss to vary significantly.

I am curious whether combining exercise or diet makes the weight loss injections more effective, and how long one typically needs to use them consistently to see weight changes. I would also appreciate it if you could share some helpful tips and precautions to keep in mind when starting out.