If it's on the clip it has a compensator valve or something like that, try manually doing it
If the problem persists I'd suggest using one of these bleeders before looking for a new compensator, had a similar problem on mine after fitting a new caliper, just would not bleed with pressing the pedal or pulling a vacuum, knew the compensator was good as it was new and the rears worked perfectly (well until the 1 caliper seized solid) used this thing & had it sorted in under 2 minutes
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Oh 🫣 well at least the compensator isn't knackered 🤣That’s what i have.