https://www.out.com/film/hallmark-gay-christmas-movies-2023
https://www.thepinknews.com/2023/08/24/luke-macfarlane-notes-of-autumn-hallmark-cast-release-date/
As for RWRB, the book is better than the movie, and the movie is better if you've read the book since it brings the book to life in a way by putting it on the screen.
The movie suffered as compared to the book IMHO for two reasons. First, a full-length novel of any quality ALWAYS suffers when made into a movie since so much has to be left out, characters end up being combined, etc. Second, the screen writer(s) and or director (origins as a playwright) couldn't resist trying to "improve" a few of the parts from the book that did make it into the movie. In a very few cases, they succeeded, like the lines about a Vitamin D deficiency and Brexit.
All that being said, I enjoyed the movie and might even watch it a second time. And yes, part of that is to ogle the MCs, especially Perez.
Interestingly, since the movie, while it's clear Galitzine (descended from Russian nobility) has plenty of work (releases since are "Bottoms" and the upcoming "Mary & George" and "The Idea of You"), Perez seems to be making a living more as a model. The only news about him has consisted of photos of him at an assortment of fashion shows.
Perez is also part Middle Eastern (Persian/Iranian possibly), Croatian and Hungarian, maybe also some Italian.