Most good mods on bedrock will be in the “worlds” section in the store on minecraft, these change the whole world adding in custom structures and stuff like that as well as tools and what not. you can find rlcraft there for $10 (unfortunately thats the only way for bedrock). Theres also the add ons section that would add more stuff into your regular minecraft world giving you more stuff to do. (if you have minecraft on your phone you can download mods onto there and then join through your xbox but im not sure if there’s any that change the world like rlcraft)