We’re using headings for different types of inventory (hardware/office items/…) and then a block of subheading, bulletpoint combination (serialnumber, date of acquisition, whereabouts,…) for each item and associated item.
The toc is generated automatically and helps browsing through.
This might be an unpopular opinion/solution but even for two small size sister companies we are doing inventory in a version controlled markdown file 🫣
That is the reason Markdown and Git are used for a lot shenanigans these days. Knowledge bases, awesome-lists, documentations. You name it.
If you got the right tools (sphinx, typora, mkdocs, …obsidian) you got a powerful toolchain.