LPE is a very well-known acronym within the security community, it's not purely academic or obscure or anything.
I agree that it would be a good idea to define it explicitly when writing for a broader audience, but I don't think it's particularly egregious that they didn't. It's certainly something I could see myself forgetting.
Then again, the whole writeup appears to be AI-generated, so...
Understanding a term with the help of context is very different from guessing what the letters of an acronym might mean. The latter is more like a crosswords puzzle, and a totally unneccessary task for the reader.
It is nowhere near this. There are very few acronyms in the IT world that are actually well-known outside of it. LPE is less well-known than LVAD or MCU.
I agree that it would be a good idea to define it explicitly when writing for a broader audience, but I don't think it's particularly egregious that they didn't. It's certainly something I could see myself forgetting.
Then again, the whole writeup appears to be AI-generated, so...