Which would be scary, if the article wasn't completely misstating the law. Nowhere does the bill state that it will ban "depressing" content. Nowhere does the bill control what people can and can't say. At worst, a platform may need to provide resources to help with mental health disorders.
For example, at the end of a depressing commentary, a site may be asked to add an automated reminder that if a person is feeling XYZ symptoms of depression, they should reach out to a qualified professional for help. Maybe same for content that actively promotes or glorifies untreated mental health issues, like that Tiktok trend in 2021 that had hundreds of kids deciding they suddenly have Dissociative Identity Disorder but also don't want to be diagnosed or treated.
Or as another example, if a minor on social media is repeatedly reporting another user for harassment, the platform may be asked to automatically suggest for the minor to block the user.
It's obvious enough that depressing content doesn't cause depression. No one is going to prosecute a news organization for reporting true facts. Even then, it would be more than a "reasonable effort" to ban an entire type of content - at the very worst, content creators who post "Top 10 reasons to commit suicide!" might be asked to label it properly so minors can't find it unless they search for it. Just add it to the site's community guidelines and enforce it. That's a reasonable effort and doesn't affect most adults at all.
I followed the link you used:
I thought the OP was ridiculous but apparently, if they genuinely identify with the culture then she might technically be correct.