please put this mod on Modrinth, this helps making modpack easier.
many basic fabric mod stopped updating on curseforge and moved to modrinth.
therefore I make modpack based on modrinth, but I don't know which launcher support both curseforge and modrinth download.
for now, I have to put .jar file of farmer's respite and I hate to do that. I don't know even if it is allowed.

It's allowed, I guess. Such mods in modpacks are marked as added via overrides and compressed into a whole .mrpack.
Although, I thinks to publish a modpack with such mods, you need to credit all such mods.

It's allowed for open-source mods like this.