After Carnage killed their hosts, Alchemax took control of the newly separated Life Foundation symbiotes.

Source: https://www.cbr.com/venom-most-powerful-symbiotes-ranked/

Scream separated from the group, and the remaining symbiotes were split from their hosts and imprisoned for further testing and experimentation at the underground prison known as the Vault.

Source: https://www.cbr.com/venom-most-powerful-symbiotes-ranked/

The hive mind also gave Knull the ability to control other symbiotes, though Venom and Carnage eventually freed themselves from his control.

Source: https://www.cbr.com/marvel-comics-venom-carnage-relationship-trivia-facts/

The presence of symbiotes in Marvel's Spider-Man 2 suggests that more symbiotes from the comics, such as Riot and Toxin, could be featured in future games.

Source: https://gamerant.com/marvels-spider-man-insomniac-missing-villains-hobgoblin-morbius-spot/

The presence of symbiotes in Marvel's Spider-Man 2 suggests that more symbiotes from the comics, such as Riot and Toxin, could be featured in future games.

Source: https://gamerant.com/marvels-spider-man-insomniac-missing-villains-hobgoblin-morbius-spot/

There is a theory that symbiotes give their hosts superpowers by enhancing their physical strength and resistance.

Source: https://www.thetigernews.com/9-most-powerful-symbiotes-in-the-marvel-universe-ranked/

While the threat of the entire world being consumed by symbiotes may have been dealt with, there are many more from the comics who could work their way into a sequel.

Source: https://gamerant.com/marvels-spider-man-insomniac-missing-villains-hobgoblin-morbius-spot/