The decision is prompt in cases of desk rejection, that is, rejection without peer review. But in your case, since the status changed to "Under review" and then to "Reviews received," it seems that your paper has been sent for peer review. If that is the case, your paper has definitely cleared the initial editorial screening and no longer stand the risk of being desk rejected. Thus, I feel you can be hopeful.
However, having said that, one cannot really be certain because some journals display the status "Under review" even for the initial editorial screening. Hopefully, the next status change will make things clearer for you.
- Tracking your manuscript status in journal submission systems
- Does a direct 'Decision in Process' status indicate rejection?