Maybe it's just me, but are all the assumptions made here true? Does liking a video, watching a TikTok, reading a blog post, catching up with my Instagram feed

Maybe it's just me, but are all the assumptions made here true? Does liking a video, watching a TikTok, reading a blog post, catching up with my Instagram feed, etc. really does anything to my dopamine levels? Have any of these activities really been shown to be bad for my physical or mental well being? Naively speaking, I personally don't like wasting my time with them, because they don't make me feel accomplished, and because there are other things I actually want to do and often don't do in favor of the ease of wasting time of my phone instead. But none of that implies those activities are bad for me. People claim there's an addiction to these things, is that true? Is it really that you're addicted to them? Would you suffer real withdrawal were the internet to be out of order for a few weeks?