[7] On 1 April 2017, Ryan scored a try and won the Man-of-the-Match award in Munster's 41–16 2016–17 European Rugby Champions Cup quarter-final victory against Toulouse.

[8] On 25 April 2017, it was announced that Ryan had been nominated by his teammates for the 2017 Munster Rugby Senior Player of the Year, alongside Niall Scannell and Tyler Bleyendaal.

[18] Following Wasps' administration and the news that Stephen Archer would require ankle surgery, Ryan returned to Munster on a three-month contract announced in late October 2022.

[19] Ryan made his 'second' debut for Munster in their 15–14 defeat against provincial rivals Ulster in round seven of the 2022–23 United Rugby Championship on 29 October 2022.

[20] He earned his 200th cap for Munster in their 2022–23 United Rugby Championship round nine fixture against Edinburgh on 2 December 2022, starting in the province's 38–17 away win,[21][22] and earned his 50th Champions Cup cap for Munster in their 18–13 home defeat against Toulouse in round one of the 2022–23 Champions Cup on 11 December 2022.

[25] Ryan made his debut for the Chiefs as a 63rd minute replacement for George Dyer in their 31–10 away win against defending champions Crusaders in round one of the tournament on 24 February 2023.

[26] Ryan returned to Munster after the completion of his time with the Chiefs in New Zealand, joining his home province on a one-year contract for the 2023–24 season.

[45][46] Ryan made two appearances for Ireland as they won a Grand Slam during the 2018 Six Nations Championship, featuring off the bench against France[47] and Wales.

[51] Ryan was selected in the 31-man Ireland squad for the 2019 Rugby World Cup,[52] having featured in the warm-up matches against Italy[53] and Wales.

[58] Ryan was selected in the Barbarians squad to face an All Blacks XV on 13 November and Harlequins RFC as part of the 2022 Autumn Nations Series.