Not everyone continues to get "suppression" beyond the first couple of months, some do as they work up the doses others don't.
What suppression means, and expectation, or need, from the medication varies greatly too and there is no wrong of right.
My experience is suppression, which I personally define as no hunger signal or interest in food at all, mostly stopped after the first couple of pens - I get it occasionally but never more than a day a week now. What did continue was food noise and obsessive cravings volume lowered, and portion sizes, if I ate mindfully, controlled. If I worked with that, staying protein focussed, reducing carbs, avoided falling back into bad habits (failed at that over Christmas when food noise ramped right back up!), making sure I was drinking enough water, I could stay within my weekly calorie deficit which lead to weight loss.
Weight loss is mostly dictated by your calorie deficit not Mounjaro dose I try to think beyond just the dose and the weight loss.
How are you getting on with staying within calorie deficit with the effects you currently get from 7.5mg? If you have lost significant weight have you recalculated your calorie deficit? If you are struggling to keep to calorie deficit what is the issue - snacking, portion sizes, food choices? If you are keeping to calorie deficit perhaps you are simply slow loser and need to be patient, what would increasing dose do for you?
As SilenceInside says you can order the next dose up but stay on same dose if you want to have the option to increase mid month.