Biodiversity loss and introduced species are the biggest risks.

Example of why that matters:

Feeding climate and biodiversity goals with novel plant-based meat and milk alternatives | Nature Communications

Explainer: Can climate change and biodiversity loss be tackled together? - Carbon Brief

In terms of introduced species, it applies to many types of life, but the exotic animal trade is one of the worst and it is famous for spreading pathogens. The exotic animal trade relies on assholes who go around abducting wild animals (sometimes farming them) and then shipping them off to consumers who like having “exotic” pets.