For Link one it looks like the data is being compiled based on a request. As a tip you can open up the develper tap in your browser and look at the network traffic when you hit the butten. You will likely see some kind of query. (URL + some settings) The settings are set based on user the user input like published parameters in an FME workspace so the the download url is not static

Here's a screen shot of what I mean from looking at link 1

Here at the top or the right window you can see the base URL. At the bottom are the request parameters. If you switch the view from "From Data" to "View Source" you can see the end part of the URL

Here's the build URL:

http://gis.co.slope.nd.us/php/downloadShape.php?whichextent=partial&srid=4269&downloadformat=gpkg&qlay=Parcels&mapext=1776921.3923182443%2B214140.65157750345%2B2144638.607681756%2B365909.3484224966&map=%2FLibrary%2FWebServer%2F1038087%2Fmapfiles%2Fbase.map&download=Download+Data

There is another method. Just because we have the URL here unfortunately when putting it in a Reader FME removes all the stuff off the end and adds a .gpkg extension to the URL.

What you want to use here is an HTTPCaller transformer to first download the file and then read the downloaded file with a FeautreReader.

Example Attached.

The HTTPCaller method will probably work for link 2 as well

Good Luck

Both sites you've listed appear to have been develop by off road software. I would try to contact off road software and ask if they offer an API to their websites and data sources (usually a REST API).