It takes time to build up and if you have been on other GLP1's you may need a higher dose or time to build up in your system.
I took Reta first time 0.5mg on a every 3 days schedule, day 1 felt nothing much, took my next dose two days later, then started to feel it was mild but helped me stick to my diet, By week 2 which I am in now I feel the apetite supressant strongly I can easily eat high protein but I end up in a 600-1000 calorie deficit, I have to eat until I am almost sick to stay in a 400-500 cal deficit.
Interesting thing though is the night before my next dose I find it easier to eat, then I dose and I am like oh yeah I am super full now, so the half life, and peaks and dips I feel a fair bit and I am on a more often dosing schedule. I was thinking if I move up a dose to go every other day, but soon I will do weekly because I have 8 days of travel back for 12 hrs then 5 days of travel so I will just do 1.5mg before my 8 day trip and then 1mg before the 5 day trip then back ot 0.5 every 3 days.