A Knowledgebase article covering 'unknown threats' or please stop relocating the knowledgebase to generic advice.

https://support.sophos.com/support/s/article/KB-000039039?language=en_US has no specific new location even though the community.sophos page is where you are directed to as the new location. Going to said page you find generalised advise that doesn't cover 'unknown' threats or how to deal with them. Reading through the generalised advise none seem to mention or apply to these threat types. Can this be addressed as I have devices I am unsure how to action now as a result of Sophos' knowledgebase constantly being relocated.