I am aware of a possible document error. The link https://maas.io/docs/snap/2.9/ui/maas-tags#heading--per-node-kernel-boot-options for the topic of per-node-kernel-boot-options points to nothing, and it looks very likely the content should be in this page instead.
I have referred to the how-to for editing MAAS document (WIP) , and I think what I need is different: for example, I could not tell what is the “more official” page and which one I should edit or report issues between these pages[*]. May anyone tell me the difference between them? I feel like the whole MAAS document is in some transition stage to adapt a new flow, and I am glad to follow up and contribute some of my effort. Thank you very much!
https://github.com/CanonicalLtd/maas-docs/blob/master/en/nodes-kernel-options.md (the github repository seems inactive?)
Kernel boot options
CLI kernel management (snap/2.9/UI)
Kernel boot options (snap/2.9/UI) ( the bottom banner of https://maas.io/docs/snap/2.9/ui/kernel-boot-options brings me here)