This number is astronomically larger than the number of grains of sand on Earth or stars in the observable universe.
When you install Trust Wallet, your smartphone generates a random 12-word phrase using a cryptographic standard called (Bitcoin Improvement Proposal 39). The entropy (randomness) comes from your device’s secure random number generator. The total number of possible 12-word seed phrases is approximately:
A Trust Wallet key generator is the core mechanism that creates your unique seed phrase
No. The blockchain is public, but private keys are never stored anywhere except on your device. No “leaked database” of Trust Wallet keys exists.