Lock Reusable Blocks in the editor to avoid unintentional global changes. Editing reusable blocks in posts is locked, and you have access to two actions when you select a reusable block in the editor: – Edit the reusable block (opens the block editing page in a new tab) – Convert to regular blocks (native action)
Options are availables in Settings > Writing screen to hide Edit and Convert reusable blocks buttons in block overlay.