Sorry, but your recommendation is a bit off‑topic because in the OP it was stated that this thread is open as the response to a user who wanted the simplest wallet possible, without any bells and whistles. I wouldn’t say that the wallet you recommended belongs to that class of wallets.
These wallets are Bitcoin-only, open-source and quite simple to use.
Even if some of them have advanced (but in my opinion necessary) features like the ability to use Tor and a private Electrum server, you do not have to use them.
I onboarded multiple first-time Bitcoiners with these wallets very successfully, hence why I recommended them.
Only now I realized the original poster was looking for an alternative to Trezor Suite, so most likely he actually needs a desktop wallet. In that case, there are Electrum, Sparrow, or even just Bitcoin Core. I'm not sure we need a whole thread for the quest after the 'most simple wallet', as it is trivial to figure out with all the lists and guides that already exist.
Envoy seems to match "simple" criteria and created by Foundation, but it's weird there's only 1K+ download on Google Play despite created in 2023.
Likely because many people aren't aware that this is a decent mobile wallet, without having to purchase a Passport device. One thing I'd wish for is coin control, but most mobile wallets sadly lack this feature.