User blog comment:MisterWoodhouse/Social Activity, the 2010 Editor, and Unpausing Migrations/@comment-25106086-20201023131750/@comment-25156300-20201023135354

There's a script that gets the old style for the new system. Though it's in beta and may not work for some wikis. I haven't gotten it to work for mine.

https://dev.fandom.com/wiki/WikiActivity