i recommend trying to read books made for children or adult learners as soon as possible, because it’s a great way to pick up vocabulary. that can absolutely be started at A2 level, although you’ll need to look up words for context fairly regularly.
B1 level is generally when learners can start reading YA-level novels without stopping too often to look things up, because their vocabularies will be good enough that they can start to infer things from context.
B2 would be about the level for a lee child / agatha christie novel, although specific terminology, less common grammatical structures, or dialectical speech will still likely throw you for a loop until you encounter them more often.
i believe C1 is when learners are getting closer to that native-like fluency with reading comprehension etc, but i’ll let you know when i get there! :P
good! hopefully this will discourage everyone who bought them from using them, so they just sit in a drawer somewhere or get recycled instead of spying on unwitting people, and meta will fail to make back the huge amounts of money they’ve invested in tech that most people don’t want 😌