How much weight loss is realistic?

I've recently started trying to lose weight after being told I need to improve my health and manage my diabetes better.

I'm seeing so many posts online where people lose a lot of weight very quickly, and honestly it makes me wonder if I'm progressing too slowly.

What is a realistic amount of weight to lose in a month? How long did it take you to see noticeable changes? I'm not looking for a crash diet, just trying to understand what a normal journey actually looks like.