Older characters from readers' advisory seminar 2021
The Thursday Murder Club by Richard Osman
The Funny Thing about Norman Foreman by Julietta Henderson
The Switch by Beth O'Leary
The Windsor Knot by S. J Bennett (the Queen herself if the older character)
The Invisible Life of Addie LaRue - ok, this last one is a bit of a cheat because Addie doesn't age but she imparts all the wisdom of a person who's lived a long time.