Hi everyone. I actually searching one datapack similar to l2scryde. I know they may have their own datapacks. But is there anything similar that has a solid foundation to start a project of that scale?

don't compare anything with what scryde has, they're the hugest lineage server out there, they have basically unlimited resources and developers working for whatever crazy idea they have in mind to be made into reality, I don't even think you can say that they're using a *name here* source, by now everything is probably all edited/debugged by their own team and can be considered their own project entirely, on an other hand, I've heard good things about Lucera though, give it a look maybe.