How to make webpack friends with legacy code (many global variables)?

Question

JavaScript

Hello!
There is a big project where it was decided to implement webpack. There is a bunch of legacy code that has a lot of global variables. for example:
2 files are connected in html

<script src="example.js"></script>
<script src="dosomething.js"></script>

1) util.js file

function example(num) {
    //...
}
function example1(str) {
    //...
}

function example2(str) {
    //...
}

There can be any number of global functions.
2) dosomething.js file

var exampleNum = 1;
var exampleStr = 'example';

example(exampleNum);
 example1(exampleStr);
example2(exampleStr);

Those. there are many globals, tracking each one and writing an exports example is not possible due to the huge amount of existing code. There is really a lot of code.
Is it possible somehow to combine the scripts required on the pages into 1 file and then access it as window.example(), without searching for exported global variables?