Trust Wallet is even more widely used than the Atomic wallet.
It doesn't matter if it's widely used. A closed source wallet should not be recommended to anyone when there are several open source wallets
The problem with a closed source wallet is that you are most of the time in the blind until a hack happens -
Trust Wallet Hacked. Understanding How It Happened and What to Do Next By the way, if all closed source wallets are not recommended, why do we use/promote Ledger Nano (Hardware Wallet) ? It is also a closed source as I know.
Who is we?
AFAIK, I haven't seen members recommend ledger Nano for a while. It's receiving heavy criticism even when they tried to make a comeback by
faking their source code status