Since there aren’t any dinosaurs around any more, wouldn’t that tend to argue that they were not on the Ark?
From what I understand of different authors, some smaller species of dinos may have been, but not every kind. This would explain the ‘dragons’ of the middle ages…and remember there were different #s of ‘clean animals’ and ‘unclean animals’, I’m not really sure which animal is considered what (except for pigs, or cloven hooved animals), so there’s no telling how many would actually have been taken along. The bible simply advises that x number of every type of animal. It’s always possible that when the ark landed, some animals expired before being able to return to a better climate, or were unable to maintain their food source. The environment was very different after the flood.
I feel like the bible is a little vague about some things on purpose - so we don’t dwell on them.