This sound effect can be found on the Jurassic Dinosaurs Sound Effects Library, which was made by Sound Ideas. It's a lower pitched and slowed down variant of one of the squeals of Sound Ideas, PIG, SCREECH - C.U. SCREAMS, ANIMAL.
Links:
https://www.audiomicro.com/intense-strained-scream-royalty-free-stock-music-888960
https://soundideas.sourceaudio.com/track/7559248
https://soundeffects.fandom.com/wiki/Sound_Ideas,_ANIMAL,_SCREAM_-_INTENSE,_STRAINED,_COMPLEX_SCREAM:_BATTLING_DINOSAUR_04#Audio_Samples
