pdfjsLib not defined

[Gruski]

I know this has been asked before in #14981 but solution there does not work. Here is the scenario:

<script src="Scripts2/pdf.mjs" type="module"></script>
<script type="module">
     // error occurs here pdfjsLib not defined       
     pdfjsLib.GlobalWorkerOptions.workerSrc = 'Scripts2/pdf.worker.mjs';
</script>

Note that I am using "pdfjs-4.0.379-legacy-dist.zip" from releases
Works on all desktop, all Android devices but not on iOS. I am testing on an iPhone 7 with v15.8 of iOS
pdfjsLib not defined early in the pipeline as shown in code above.