I'm sure it's been done before, but I can't think of any examples off the top of my head. If you have a story written in 3rd person POV, what is the good and bad of writing a prequel or sequel in 1st person? (or vice versa.) Is there a rule of thumb on this that you like to follow?
If you're following the same character, you should follow the same rules. The reader expects that. Unless you have a prequel or sequel from another character's point of view. In that case you can change everything. It's done a lot. Anne Rice if a good example, just to mention one of my favourites.
I thought this was helpful to read. If I paraphrase correctly, it says you can use up to two POV's but stick between them two for the entire piece. I think ideally you want to stick to one or two of the same types of POV's. https://thewritepractice.com/point-of-view-guide/ So if you are like writing a series or chronicle, this could be useful if done correctly. I am trying this with the main character and her computer log as she enters daily loggings. I read somewhere that it's easy to confuse the reader if done incorrectly, and I am basically as green as they come so it's something I am also looking into. xD
Two books in the long-running series of Harry Bosch detective novels were written in first person rather than the usual third person: The Lost Light and The Narrows. Both were on the New York Times bestseller list (as is typical for books in that series). Generally I'd keep it consistent, and to third person limited without any overriding reason, though changing it can be done.