"Save Block as" command is used to make a similar block, but with a different name.
If you have a block or a Dynamic block and want to create a similar block with slight modification, use "save block as" with a new name and edit the block with block editor.
- Open block in block editor.
- Click “save block as” icon.
- Enter new block name.
- Then edit block according to convenience.
- It will not lose dynamic properties
Related Post : Rename Existing Block