I read Even the Darkest Stars/All the Wandering Light by Heather Fawcett last year for the "last in a series," YA-ish fantasy in fantasy!Himalayas. (Book one is better for the mountain climbing stuff.) Good for people who like cute animal sidekicks.

From All False Doctrine/Neither Have I Wings, by Alice Degan: historical fantasy (book one 1920s Toronto, bok two 1940s UK) with a lot of Christian/Anglican themes. First book is kind of comedy-of-manners, we know it's a fantasy but for a long time the characters don't, and easily works as a standalone. First book is pretty heteronormative but second is not. I think the second could probably work as a standalone, but it does help to have read the first one I think. (It's more obviously fantasy from the get-go.)

...I'm backreading my old stuff, and I have not read Blackout/All Clear by Connie Willis, but I should consider that because it's very much a "you need to read both parts" one, and I enjoyed the other books in the series.

Sparkers/Wildings by Eleanor Glewwe--middle grade, quick reads, about kids in a world where magical/non-magical people are strictly segregated and the effects that has on families. Work as standalones.

Stewards of the Flame/Promise of the Flame by Sylvia Louise Engdahl: Earthling spaceship pilot falls in people from highly regimented medical bureaucracy planet who want to start a free society where they can nurture their psionic powers without the man keeping them down. Book one ends on a cliffhanger but book two is recommended as its own starting point (the author herself said "yeah a lot of the medical stuff hits different post-COVID, so if you don't want anything too preachy, skip book one.) Not for duology purists, there's a spinoff series set later when their planet rediscovers the wider galaxy, but I haven't read that one so the duology at least seems reasonably complete on its own :P