Upcoming social media bans and digital ID verification in a few days - Alternative platforms?

There is an upcoming social media ban and forced digital ID verification starting in a few days in Australia and soon in UK and EU.

From what I've seen online, a lot of people (Gen Z and millennials mainly) are going to be refusing to comply and leaving Instagram, Facebook, YouTube etc.

With this said, what alternative platforms do we have?

Mailing lists?

Substack?

Website?

Alternative forums?