Is there a technique/library/tool/ML to detect a falling or decaying or dipping curve?

Is there a technique/library/tool/ML to detect a falling or decaying or dipping curve?

I know I could take rate of change/difference derivatives between 2 intervals and continue differencing.

But I have many intervals/time points.

So is there a better technique that can look at the curve (i.e the series of values/Pandas series) and give me an answer?

E.g. if it can detect the following type of series as dipping/falling/decaying globally.