via make.wordpress.org => original post link
WordPress 6.1 comes with an experimental content locking for block, patterns, and templates, as well as a template lock inheritance for the Column block.
Almost any layout using the core blocks can be composed and shared as pattern. End users may have found they could accidentally break these layouts or use them in an unexpected way. Previously, the experience of using patterns was not still on par with that of having a specific block for a complex layout.
With WordPress 6.1, a new experimental type of locking has been added, called “content locking”. This locking method can be used by any pattern or block. When enabled, the users can only change the nested content inside the block/pattern. The block structure starts behaving as a single unit where the block hierarchy is entirely hidden. The user can only change text and media URLs in the blocks.