I have a text string which contains a repeating pattern, each repetion separated by the next by the . (dot) character. The pattern may end in a _123 (underscore followed by a sequence of digits), and I want to catch those digits in a dedicated capturing group.

The RegEx (ECMAScript) I have built mostly works:
https://regex101.com/r/iEzalU/1

/(label(:|+))?(w+)(?:_(d+))?/gi

However, the (w+) part acts greedy, and overtakes the (?:_(d+))? part.

Adding a ? to make w+ non-greedy (w+?) works, but now I have a capturing token for each character matched by w

How can I make this regex such that w+ acts greedy but still does not overtake the _(d+) part?
Otherwise, is it possible to capture all tokens matched by the non-greedy w+?, as a single match? (some capturing/non-capturing groups magic?)