Power Query regex example from http://www.thebiccountant.com/2018/04/25/regex-in-power-bi-and-power-query-in-excel-with-java-script/

regex.m

let
  fx=(x,y)=>
    Web.Page(
        "<script>
            var x="&x&";
            var y=new RegExp('"&y&"','g');
            var b=x.match(y);
            document.write(b);
        </script>")[Data]{0}[Children]{0}[Children]{1}[Text]{0}
in 
  fx("""hello012中国1235""","\\d+")

You can shrink down the whole thing above to just
(text, pattern) => Web.Page("<script>document.write(new RegExp('"& pattern &"').test('"& text &"'))</script>")[Data]{0}[Children]{0}[Children]{1}[Text]{0}

I also recommend using this as a function that you call separately, as it'll keep things way cleaner

You can shrink down the whole thing above to just
(text, pattern) => Web.Page("<script>document.write(new RegExp('"& pattern &"').test('"& text &"'))</script>")[Data]{0}[Children]{0}[Children]{1}[Text]{0}

this only gets you a true/false output

My take on the snippet, ready to paste to as new query:

let   fx=(text,regex)=>
    Web.Page(
        "<script>
            var x='"&text&"';
            var y=new RegExp('"&regex&"','g');
            var b=x.match(y);
            document.write(b);
        </script>")[Data]{0}[Children]{0}[Children]{1}[Text]{0}

in
fx

basically it's the same, it's only easier to use if you don't know power query :)

edit: check the performance of this solution, I think this it is super slow for bigger data.