Human Croquet by Kate Atkinson has an element of time travel in it. It’s an interesting and readable book such as I’ve come to expect from the author. I read it at the same time as Matt Haig’s How to Stop Time. I enjoyed both.
I loved ...before the coffee gets cold. By Kawaguchi, not normally my type of book but it was recommended and I read the series in the end. Also The Midnight library, again not my normal reading but loved this too, I now try most books recommended even if not my genre. Agatha Christie is/was my type
I'm reading 'Yesteryear' by Carol Claire Burke. I am only third of the way through and the time travelling element could be seen in a couple of ways. The writing is very sharp packed full of phrases I wish I had used or will use.
As for uplifting fiction I always enjoy the 'Aga Sagas' for a re read especially Joanna Trollope and Mary Wesley.
I recommend The First Fifteen Lives of Harry August by Claire FNF North. The book is about a man who lives the same life repeatedly, remembering each cycle.