I still have membership in HN, which is the last of my social media, but even that I have suspended several times in the last 12 months. I suppose I will logout of HN also in the near future, and then I will be a member of zero social media.
There is no way to be 'forgotten' by social media. You can only logout and resolve to never login again.
The only way out is to get banned.
Never joined Facebook, twitter, etc.
I keep tabs on my regions physical and mental state via Nextdoor.
Never joined Facebook, Twitter..
Active in Reddit though.