Depending on the solution, yes. But some detailed review from a new user might be useful as well. A recent community guide, that has been moved since, makes me think that this proposal would not be that useful.
It can go either way. If the guide is high quality after a thorough review, then the subcategory can become useful for curation, whereas if the guide is poor quality, then the subcategory is not necessary.
Simply following the guide itself until the instructions end. Regardless if it literally checks out or not, the reviewer can edit the guide if there are any errors and may optionally provide a (detailed) commit comment at the bottom of the topic, acting like a changelog/ledger for future reviewers.
Any interested Qubes OS user against the guide’s requirements. If you want a more conservative and explicit suggestion, @trust_level_3 and up.
Evidence can optionally be provided using screenshots.