The Search module from CMS core allows to limit the Content type and is quite suitable for use, the settings are available for understanding. The form is added to the pages like other blocks /...
I played around with metatags and when i revisited those pages they now have description metatags. Not sure what the initial problems were though. Sorry for the time waste.
Layout is not Content, it is not used to create pages, so I think you have chosen the wrong way. To avoid problems, just need to use every tool for its own purpose. This is not a direct answer,...
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Here are some issues I would like to talk about or revisit (as time permits) during the Weekly Dev meeting or during the Design/UX meeting.
Better defaults position for breadcrumbs on installation of new sites.
https://github.com/backdrop/backdrop-issues/issues/4113
Config Recipes
* What can we do for the next release?
* How do we promote this? Is this a few feature (in theory, except for a bug it was there before)?
https://github.com/backdrop/backdrop-issues/issues/3763
Add a 'User: compare' visibility rule
Is this a good feature for core? Can we get it working for this release?
https://github.com/backdrop/backdrop-issues/issues/4029
This batch of issues
Add a new pageless node above the "Promoted Content" block on Home page
https://github.com/backdrop/backdrop-issues/issues/4849
Provide a new 'hidden-path' content type OOTB, and use it as a content block
https://github.com/backdrop/backdrop-issues/issues/4903
[UX] Change default home page from 'user' to 'node' - if user removes path to home
https://github.com/backdrop/backdrop-issues/issues/3343
A recent update with our long-standing symlink problem: Issue 3008
There's now a simpler alternate approach with less impact. Some core dev eyes are welcome.
The purpose is, to solve the initial problem soon. If people need more elaborated solutions for special cases, this could be a follow-up.