If you know what SF-Symbols are you probably have the app installed along with the fonts.
This action enables you to browse through them without opening the app. If you have the app installed you can simply select it and press space ␣.
You can then either paste the symbol ↩ or the name ⌥↩.
Download LaunchBar Action: SF-Symbols Browser (powered by DownGit)
This action integrates with Action Updates by @prenagha. You can find the latest version in his Github repository. For more information and a signed version of Action Updates visit his website.