The classification of wallets is custodial and non-custodial wallets, open source or closed source, and since Trust Wallet is a closed source wallet, it is difficult to confirm the claims that it is a non-custodial wallet.
In short, the logical classification of Trust Wallet is that it is a closed source multi-cryptocurrency wallet.
When compared to other lesser-known closed source wallets, it is the best, and since there are reliable and open source options, it is better to use these options.