As per the instructions on this page:
https://www.joomshaper.com/documentation/helix-framework/helix-ultimate-2/custom-code-css-js-meta
given to me by Anne from your chat... [thanks Anne for the good support].
but even though I have the file present where it should be [see hidden content for file URL]
It DOES NOT get compiled/taken into account ;(
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Using Joomla 4.2.4
Using SP PageBuilder 3.8.9
Using JoomShaper Wimble 2.0.0 template
Only 1 non Joomla / JoomShaper component: OS Map
Only 1 non Joomla / JoomShaper plugin: Regular Labs Cache Cleaner