When will the effects of forehead wrinkle botox start to appear?

I got forehead botox with Xeomin at another dermatologist about a month ago.

I used to get it at Maypure, but since it was an event, I tried it at a different place.

When I used Maypure before, I would usually feel a little stiffness around my eyes after a day or two, and after a week, the stiffness would disappear and the wrinkles would smooth out.

But this time, even though it's been almost a month, I still have small wrinkles on my forehead.

Is this...not working?

Can I get it done again at Maypure? Or should I go back to the dermatologist I got it from and talk to them?

I've been getting botox injections for wrinkles regularly, but this is the first time I've experienced something like this.

Has anyone had any experience with forehead wrinkle botox?

If you have, what did you do?