Please add this suggestion: example
admin:
display-tab:
prefix: '&cAdmin '
suffix: '&f'
display-above-head:

• ′&cAdmin'
• '&f%player_name%'
• '&e$%vault_eco_balance%

Screen https://imgur.com/a/2NlJzJA

I don't think above the head is possible. I could be wrong.

Its possible.
https://www.spigotmc.org/resources/tab-1-8-x-1-13-2-reborn.57806/