They can be found in many places, but arguably the highest-quality mods can be found in JamByte's Discord server.
The full explanation: When you join a modded server without having subscribed to their mods first, the game will give you a list of which mods you are not subscribed to with an option at the bottom to download and enable all missing mods. You are supporting the author community whenever you use CurseForge and see an ad, or by subscribing. The simple version: Automatic downloading of mods allows you to join a server without having to find and subscribe to every mod first. Overwolf shares 70 of the apps revenue with them.
I recommend you use this upon downloading the new version.Note: There are no mods for iOS as of January 11th, 2020. The Dalek Mod is a Minecraft modification that adds in many elements from the famed science fiction TV show, Doctor Who.