[9] Shortly before the United Kingdom voted to leave the European Union he expressed his wishes for the Republic of Ireland to rejoin the Commonwealth.

[11][12] In May 2021, Feighan's proposal to introduce minimum unit pricing for alcohol in Ireland was approved by cabinet ministers.

[13] A decision by the Department of Health on the suspension of the North Inner City Drugs Task Force in July 2021 was criticized by the group's director Professor Joe Barry.

Feighan, as minister with responsibility for drugs strategy, defended the decision due to "governance shortcomings" in the group.

[14] He was criticised in July 2022 after privately meeting with an anti-cannabis lobby group, known as the Cannabis Risk Alliance.

[16] In March 2024, Feighan supported Simon Harris for the 2024 Fine Gael leadership election after the resignation of Leo Varadkar.