Battleground conditional

Hey there! I use bartender, and I’d like to setup a conditional to display a bar while I’m only in battlegrounds. I have it full of those BG only potions.

How do I do that?

Not sure if anyone here can assist you with that, but you could try posting this question on the bartender addon page on curseforge.
https://www.curseforge.com/wow/addons/bartender4

There’s no macro condition to detect if you’re in a bg so you can’t determine bar visibility that way.