the full thing is a long read, but its very good and interesting!

Is this a decent translation?

http://www.gnosis.org/naghamm/thunder.html

It's the same translation provided at the collection mentioned in the post. https://earlychristianwritings.com/text/thunder.html

Here's a more recent rendition https://diotima-doctafemina.org/translations/coptic/the-thun...