@2TechAdix they have just the more common ones there and then we can add. The key thing is you have to find the RSS feed URL for it. Usually websites have an RSS feed URL or something, but I’ll give you an example of something you can use. Rzeczpospolita is well known in Poland, yes? So let’s say you want to use it.
Their RSS feed is rp.pl/rss_main. So you would type that in and get something like below:
Once you choose to Get feeds from it turns into
Hit the + to add to your feed.
After you refresh everything, you would see it available, like below:
If a website doesn’t readily provide their RSS feed to you, then you can typically right click and choose Page Source. From there you would use your OS search feature (like Ctrl F on Windows) to search. You would look for RSS or Feed and find the URL there.