FTB Quests (Forge/Fabric) Mod 1.18.1/1.16.5/1.12.2 offers a list of questions, guides, shortcut keys, and other sections. In which, you need to add quests yourself or play a mod pack that has available quests.

About FTB Quests
It is a lightweight and team-based questing mod that is not difficult to use. Visit its wiki and you can find everything that is essential to start or delve deeper!
Note that the release will not supplement any quest on its own.
FTB Quests is a server utility Minecraft mod that relates to Adventure, RPG, armor, tools, weapons, and more. To approach the content, please download and install Minecraft Forge first!
Screenshots
Download Links
Minecraft Mod 1.16.5 (Forge)
Minecraft Mod 1.16.5 (Fabric)
Minecraft Mod 1.15.2 (Forge)
Minecraft Mod 1.12.2 (Forge)