Whenever I see unknown news sites I check bias metrics for them first, like: https://mediabiasfactcheck.com/newsguard/
If that doesn’t work out, then I check for things like an about page or similar to find out about the owners, or the authors pages if they exist. A lot of those fake sites don’t have any of that usually, or provide very generic information, like an example text they copied. I think generally it means people need to be more trustful with vetted news sources and be more mindful not to believe every bullshit presented to them on some random ass website. This was always the case on the internet, and is even more true now in the age of disinformation.