I love the word “serendipitous”..
I also do , actually made a speech about it in a small on site pre covid meeting couple of years ago
I understand a "serendipia" as something very improbable that occurs because it has to
So , I watched videos of people who studied it, these "experts" agreed on that you cant say that tomorrow or next week will happen a "serendipia" , you can hardly know
But you can find signs that indicate a serendipia is about to happen
One day you wake up "confused" , you miss your train to work for 1 minute , you have to change all the things you planned for that day , go to buy food to a new shop you never visited before , and there you meet the person u will live with..
It just had to happen...