I’m mainly a fantasy reader so your mileage may vary, but His Majesty’s Dragon by Naomi Novik was a lot of fun when I read it years ago. It’s basically what if there was a dragon Air Force during the Napoleonic Wars.
Psalm for the Wild Built by Becky Chambers and Legends & Lattes by Travis Baldree were both super fun and cozy.
If you prefer a more mysterious bent, The Maid by Nina Prose and The Dog Sitter Detective by Antony Johnston were both fun.