A WA showing the remaining cooldown on Dragonflight combat potions. This should work with all combat potions that share a cooldown with the mana potions, but if you spot any problems let me know.
If you have a Alacritous Alchemist Stone, it will also show each time the buff is active and 10 seconds has been taken off the cooldown.
For the Phials and Sustaining Alchemist Stone version, click here: https://wago.io/pSac82u1j