Your subscription list is hidden when you’re currently viewing a community or a user’s profile. It should be at the bottom of your sidebar on the right if you’re on https://lemmy.world/ or whatever instance your account belongs to when using the default desktop view.
You can also use something like https://old.lemmy.world/ and your subscriptions will be in the dropdown in the upper left under “my communities”. This can be viewed even when viewing another community/user’s profile.
Have you checked that you haven’t blocked the person posting?
Also, those posts in the signed out view all have the English tag set, you may need to go into your settings and add English to your selected languages. Keep Undetermined selected as a fallback for when people do not set a language for their posts/comments.