F-Droid

Translation of the key fragment:

❗️To protect yourself, download apps only from trusted sources.

RuStore is the official Russian app store, created with the support of VK and the Russian Ministry of Digital Development. Every RuStore app undergoes a security check to ensure it meets requirements before being published. Google Play, Galaxy Store, Huawei AppGallery, and F-Droid also conduct security checks.

Of all these mentioned alternatives, the last one isn't pre-installed and obviously has a smaller reach akin to fediverse, yet it's there, so it's a little win I guess. If that geeky obscure international FOSS appstore got cheered by national infosec persons who naturally enjoy localization, it says a lot. It's a genuine praise from an unlikely place.

I generally trust that channel, mostly for their simple guides you can send to your parents and kids about a recent scam scheme. Sometimes it reeks of propaganda, as you could've noticed with 90% of that quote being about the RuStore thing I personally can't trust. But for ru-speaking fellas it's probably worth bearing with it.