Trykosaurus, Diorajasaurus, Rajakylosaurus would be either sauropod killers with their heavy armors or most likely dedicated bully scavengers, muscleing off non-armored predators off of carcasses and fresh kills.
Indominus Rex would be an Apex Predator, hunting whatever it wants. It’s basically a perfect mix of Giganotosaurus and T-Rex with apelike arms. It could and would kill anything it wanted.
Indoraptor most likely would be a pack hunter normally, hunting medium and large prey in 2-4 packs.
Mononstegotops… Highly territorial omnivore, most likely, securing an area and grazing the plants there and killing and eating anything it could catch. Then move onto the next territory if it’s current one is exhausted.
Alankylosaurus and Darwezopteryx would be predators, just like Quetzacoatlus, patroling the sky for any potential meal, then land and kill whatever they set their eyes on. Since Darwezopteryx has jagged teeth and Alankylosaurus has a jagged, crushing beak, they would be able to hunt pretty large preys. Alankylosaurus could be an omnivore as well.
Stigydaryx imo looks like a dedicated nutcracker. Imagine a prehistoric giant tucan, eating fruits and seeds. It has a beak that would crush coconuts easily.
Pterovexus… Looks kinda like a vanilla Dimorphodon, so I am guessing either insects and lizards or fish. Probably both.
Suchotator, Spinotasuchus and Tryostronix are basic Spinosaurids in anatomy, so dedicated fish eaters. Maybe catching sick or juvenile dinosaurs when fish is scarce.
Gigaspikasaurus, Nodopatosaurus and Nodopatotitan are standard sauropods basically. Only difference is that they might not have any natural predators, because of their armor.
Proceratomimus and Monomimus probably would fill the niche of a small predator like Coelophysis or Ornitholestes.
Ankylocodon would function similarly to how I described Mononstegotops.
Majundasuchus… Probably an Apex predator hunting around wetlands, being both deadly in water and on land.
Gorgosuchus and Megalosuchus would be Apex predators as well, just like how Postosuchus was. Same for Purrolyth.
Grypolyth is basically a weird Sarcosuchus, so same ambush predator. Sarcorixis as well.
Utarinex is standard pachycephalosaur, so small sized prey herbivore. Touramoloch would be a typical hadrosaur except having little to none predation, because it is heavily spiked.
Stegodeus, Amsrgacephalus and Tragodistis would probably be standard Ankylosaurids, so armored herbivores being able to fend off attackers. Probably would be even better in that than their pure counterparts.
Utahsinoraptor and Pyrritator are standard dromaeosaurids. Probably they would be around 6-7 meters, knowing their genetic makeup, making them almost Apex predators or maybe even apexes.
Tenontorex is basically an Iguanodon. Nothing to say about it. Edmontoguanodon as well.
Diplotator probably would function like a crocodile instead of a salamander.
Skoolasaurus… I kinda imagine it as a snapping turtle, waiting on the bottom of the lake to catch unsuspecting fish.
Erlidominus would be an unstoppable Apex predator as well.
Diloranosaurus is not that different from Dilophosaurus, so basically middle sized predator. Diloracheirus probably would function like Monostegotops.
Thoradolosauruses, Tyrannolophosaurus and Allosinosaurus are basically vanilla Apex predator theropods.
Dimodactylus… No particular reason, but I always imagined it as a sky piranha, hunting in flocks and ripping out huge chunks of flesh from any prey it could sink those razor teeth.
Magnapyrritor… It has a sickle claw, a fin and semiaquatic capabilities from the Spinosaurid parent and has raptor DNA. I imagine it a pack hunter version of Majundasuchus, being an effective killer on both land and in shallow water.
Monolometrodon is just a punk Dimetrodon. Nothing different.