Yes. Weather is actually linked to the biome. It's possible to edit a planet.biom file to get it to allow different biome records.
As far as I know there's no way to completely rewrite the planet.biom file. You can edit it to change, for example, all ice biomes to forest biomes, but you can't change where those are located on a planet. So if your tidally locked planet does not already have a hot side, a cold side and a twilight belt there's no way to make that right now.
Of course it's possible that someone has figured out how to do it and just isn't sharing. I don't have the time to dig through the narcissistic mess that is Discord hoping to wander across the one channel that explains things.