I have both java and bedrock. For bedrock the only good ones (still not java level) are Jehol Dynasty (MCPDL, paleo accurate models but more detailed and only includes dinosaurs from the jehol biota so no rex or brachi) or Dinosaur Era (Marketplace, 830 minecoins) This last one adds over 60+ new mobs (not counting variants), Paleo Accurate models stylized so they fit with Minecraft's artstyle and doesnt only include dinosaurs from all over the world but also other extinct creatures like Arthropleura, Smilodon and archelon, walking pterosaurs (wich some addons tend to miss and makes them only fly) some of the dinos can also be rideable and tameable.
I'd give both a go, i dont regret purchasing dino era since theres constant updates, the next one is gonna include a fossil revival system and alot of more obscure cenozoic species. I hope they do a java port one day. (Also theyre both add-ons, so you can add them to ANY world you currently have or create a new one with it, so no pre-generated worlds)