Ok so I've done some searching on Uncle Google and Aunty...

Ok so I've done some searching on Uncle Google and Aunty Wiki....(hmmm source of truth, ahem!)

Wiki had a list of priority review vouchers that had been awarded since 2009.
I went through and checked and all of them received FDA Approval - see table below.

https://en.wikipedia.org/wiki/Priority_review
also footnote 2.
https://www.raps.org/regulatory-focus/news-articles/2017/12/regulatory-explainer-everything-you-need-to-know-about-fdas-priority-review-vouchers

I did find one PRV that was used unsuccessfully in 2011. Haven't done enough digging to see if others rejected
http://www.fdalawblog.net/2011/07/priority-review-vouchers-not-much-bang-for-the-buck/
Whilst its an old 2011 article, it said the Priority Review Voucher was unsuccessfully used by Novartis to accelerate the review of its Biologics Licensing Application (BLA) for Ilaris (canakinumab). NB: this was a PR voucher that was awarded to Novartis after their 2009 successful approval of COARTEM (The FDA issued the new PRV as a 'prize'). So Novartis rolled the dice in 2011 on another drug of theirs (not of the FDAs choosing) and FDA rejected it.

But for the most part, as per below, all have been FDA approved.

	Program	Drug	Indication	Company	FDA Approved
1	Tropical disease	Coartem	Malaria	Novartis	Apr-09
2	Tropical disease	Sirturo	Multi-drug-resistant tuberculosis	Janssen Pharmaceutica	Dec-12
3	Rare pediatric disease	Vimizim	Morquio syndrome	BioMarin Pharmaceutical	Feb-14
4	Tropical disease	Impavido	Leishmaniasis	Knight Therapeutics	Mar-14
5	Rare pediatric	Unituxin	Neuroblastoma	United Therapeutics	Mar-15
6	Rare pediatric	Cholbam	Zellweger syndrome	Asklepion Pharmaceuticals	Mar-15
7	Rare pediatric	Xuriden	Orotic aciduria	Wellstat Therapeutics	Oct-15
8	Rare pediatric	Strensiq	Hypophosphatasia	Alexion Pharmaceuticals	Oct-15
9	Rare pediatric	Kanuma	Lysosomal acid lipase deficiency	Alexion	Feb-16
10	Tropical disease	Vaxchora	Cholera prevention	PaxVax	Jun-16
11	Rare pediatric	Exondys 51	Duchenne muscular dystrophy	Sarepta Therapeutics	Sep-16
12	Rare pediatric	Spinraza	Spinal muscular atrophy	Ionis Pharmaceuticals	Dec-16
13	Rare pediatric	Emflaza	Duchenne muscular dystrophy	Marathon Pharmaceuticals	Feb-17
14	Rare pediatric	Brineura	Batten disease	BioMarin Pharmaceutical	Apr-17
15	Tropical disease	benznidazole	Chagas disease	ChemoResearch	Aug-17
16	Rare pediatric	Kymriah	B-ALL	Novartis	Aug-17
17	Rare pediatric	Mepsevii	Mucopolysaccharidosis type VII	Ultragenyx	Nov-17
18	Rare pediatric	Luxturna	RPE65-mutated retinal dystrophy	Spark Therapeutics	Dec-17
19	Rare pediatric	Crysvita	X-linked hypophosphatemia	Ultragenyx	Apr-18
20	Tropical disease	Moxidectin	Onchocerciasis	Medicines Development for Global Health	Jun-18
21	Rare pediatric	Epidiolex	Lennox-Gastaut syndrome	GW Pharmaceuticals	Jun-18
22	Material threat countermeasure	Tpoxx	Smallpox	SIGA Technologies	Jul-18
23	Tropical disease	Krintafel	Malaria	GlaxoSmithKline	Jul-18
24	Rare pediatric	Revcovi	Adenosine deaminase-SCID	Leadiant Biosciences	Nov-18
25	Rare pediatric	Gamifant	Haemophagocytic lymphohistiocytosis	Novimmune	Nov-18
26	Tropical disease	Egaten	Fascioliasis	Novartis	Feb-19
27	Rare pediatric	Symdeko	F508del cystic fibrosis	Vertex Pharmaceuticals	Feb-18
28	Tropical disease[9]	Dengvaxia	Dengue	Sanofi	May-19
29	Rare pediatric[10]	Zolgensma	Spinal muscular atrophy	AveXis	May-19
30	Tropical disease[11]	Pretomanid	Tuberculosis	TB Alliance	Aug-19
31	Material threat countermeasure[12]	Jynneos	Smallpox	Bavarian Nordic	Sep-19
32	Rare pediatric[13]	Trikafta	Cystic fibrosis	Vertex Pharmaceuticals	Oct-19
33	Tropical disease[14]	Ervebo	Ebola	Merck & Co.	Dec-19