Every country in the world already does tons of intervention combatting addiction. There are already bans and restrictions on gambling, drugs, alcohol, cigarettes etc… Wether we consider social media addiction to be harmful and how to do it is a good question to be asked, but intervention into harmful addiction is generally uncontroversial.
Note that gambling is currently the only recognized non-substance-related addiction in the DSM-5. As a society we speak of things like 'tiktok addiction', 'gaming addiction', 'food addiction' and 'porn addiction' but none of these are real recognized disorders. That is not to say that certain behaviors cannot be maladaptive and hard to quit, but this is not enough to make something an addiction - we don't call hypochondria a 'cleaning addiction' even though it might look like one.
