grep not find a table in a paragraph

Aside from potential bugs, your screen shot shows that there are no paragraphs that actually start with a digit and end with END.  There are 4 distinct paragraphs in that story: The first is empty, the second starts with 15 and ends at the hyphen before the table, the third contains only the table, and the fourth ends with the word END, but starts with Velis, not a number.

That might not be the only reason the GREP fails to find a match, but there ceertainly is none to find here.

Why do you want to select these texts? [to make what…]

(^/)  The Jedi

This is a known problem: the dot doesn't match the table character (U+0017). The dot doesn't match the footnote marker either, but at least there's a workarounf for that. That workaround doesn't work for tables though. The problem is that even a GREP search for the table character (look for \x17 or \x{0017}) won't find anything. (In the Text tab you can look for <0017>, which does find tables.)

The only way I know of to deal with this is to find all ^\d, then find all END\r, and process the text between these start and end points. Along these lines:

app.findGrepPreferences = null;

app.findGrepPreferences.findWhat = '^\\d';
starts = app.activeDocument.findGrep();

app.findGrepPreferences.findWhat = 'END\\r';
ends = app.activeDocument.findGrep();

if (starts.length !== ends.length) {
  // Log a problem
  exit();
}

for (i = starts.length-1; i >= 0; i--) {
  fragment = starts[i].parentStory.characters.itemByRange (
    starts[i].index, ends[i].index+4
  );
  // Now do something with the fragment
  process (fragment); // To be defined
}