Modern calamares (as used in recent releases of Lubuntu; 21.04 or later) defaults to creating/using a swapfile even when the drop down item isn’t offered (the drop down allows you to disable the default). That was talked about a bit in the swap FAQ post a little.
What update(s) do you have in mind? I also don’t know what access rights you have with Ubuntu, eg. can you access pad.ubuntu.com with write access? as I can see this site doesn’t allow you to directly edit our wiki page yet.
I could upload the text somewhere eg. pad.ubuntu.com, notes.lubuntu.me, even gdoc such as here , and you make your suggested changes, and we apply them 
The same may apply to the FAQ that was written.
Would anything like this work for you? If you have an alternative, please let me know. The more help we get, the better we can make our beloved Lubuntu product.
If you’d instead suggest we create a new page that shows readers how to change the existing 512MB swapfile to a larger file, that would be welcome too (I suspect the existing 20.04 & 20.10 page won’t apply when 20.04 reaches EOL next April)
Thank you for your suggestion(s), and helping to make Lubuntu better.