Sorry for the slight diversion, but this is somewhat relevant. I was reading this topic and thought that it might be useful for anyone who might be interested in a feature request for expanded use of regex similar to what was shown here but applied to all the various operators, here is a link Let regex search work with tag: line:() and section:() options
One thing, I forgot to mention in the linked topic, but just added as an edit, is that regex also already works on the task: operator, the task-todo: operator, the task-done: operator, the content: operator, and the block: operator as well as the file: and path: operator .
https://help.obsidian.md/Plugins/Search#Search+operators
For people surprised to see these additional operators not shown in the search popup, the above page explains it much better than I can as well as some key syntax to take search to the next level. Anyways, I apologize for jumping in here and promoting a feature request, but I don’t feel it is too far out of place to do so in this context considering the conversation in the linked feature request was with @CawlinTeffid
Thanks so much for all your generous help here on the forum. It is very much appreciated. I feel like you would be a good moderator.