No, I would argue PIRA is simply dormant for now in the same way the IRA of the 1950s was.
Indeed, Republican ideology has always argued they DON'T derive legitimacy from popular support. They derive it from the claimed legitimacy of their lineage.
The Intelligence security assessments in the 🇬🇧 and 🇮🇪 is very clear - PIRA still exists and PAC controls PSF/PIRA with an overarching strategy. It shows they still collect intelligence on political opponents.
The same assessment shows NONE of the Troubles era terrorist groups have gone away.
No, they're simply dormant and Provo ideology is not itself dying - its constantly glorified, especially by young people. The Provos don't argue Provo violence is wrong. Instead they argue its not needed at present. What PSF/PIRA have been doing for years now is bringing lawsuits against people to try shutting them up.
They recently lost a case against Malachi O'Doherty and subjected that man to years of lawsuit hell. The Provos' weapon of preference these days is lawfare. When they believe politics isn't bringing them what they want, they'll eventually reactivate their armed wing. They have a history of doing this.
Very, very different to anything you're attempting to claim.