During my daily consultancy/Training work i'm not so involved on Windows side but everytime someone ask me about Windows Item key i'm going to foolish...
For instance: "proc.cpu.util" and "proc.mem" those two Items are not support on Windows OS but if you look on documentation "https://www.zabbix.com/documentation/current/en/manual/config/items/itemtypes/zabbix_agent" there is not "clear" way to understand that (doc_agent.png) also from the page "supported_by_platform" (https://www.zabbix.com/documentation/current/en/manual/appendix/items/supported_by_platform) is not easy to understand (supported_by_platform.png).
Please provide a better overview of what is support and what is not for every OS to better benefit of all item key support to a specific OS.
For instance i never know about Windows "proc_info", yes is my fault but it could me be mention on the main Item Key page as sort of "replacement for proc.mem" on Windows OS.
Thanks o much