style 2
I prefer this approach because I do not feel overwhelmed navigating through a left sidebar with too many options. It provides a better experience when entering a specific section, as the subtopics for navigation are placed in the right sidebar. This structure aligns with standard technical documentation frameworks I have encountered, such as GitBook, Astro, and Docusaurus..

For me Style 3, the left side bar makes navigation easy and helps me find specific topics quickly.

Level 3
Antivirus + Anti-malware + Device control + Encryption,  CrowdStrike, Microsoft Defender, SentinelOne

I preffer style 2 because three levels are sufficient to organize and split the subjects, while a right sidebar with specific titles provides fast navigation within the same page. Some topics are not substantial enough to justify a dedicated page, so keeping them as sections within the same page makes the content easier to navigate and more efficient to consume.

Search bar would be great.

I prefer Style 3

I prefer Style 3

I like style 2

I prefer Style 3 — Left: 4+ levels + Right: No Page Directory.
No Page Directory looks cleaner.                                

Style 3.
Easier navigation and less congestion of the documentation.

i prefer style 2