try "smaller than"
also checking if its smaller than 2 minutes then checking if its greater than 2 minutes it probably not gonna work.
Or you can do this instead
command /refill:
permission: pot.refill
permission message: no perms lol
cooldown: 2 minutes
cooldown message: &cWait %remaining time% &cbefore using this command again!
trigger:
set {_gui} to a new chest inventory with 6 row with name "Pot refill"
set {_filler} to 0
loop 54 times:
set slot {_filler} of {_gui} to splash potion of healing
add 1 to {_filler}
open {_gui} to player