As others have replied already, it does, depending on which solution you pick out of the list. I'm a happy user of this app, no affiliation at all in case someone was wondering.
The URL includes 'doh', which means 'dns over https'. That is the encryption layer which 1.1.1.1 uses.
Cloudflare also has DNS over TLS that you can enable in the Settings, which is probably what everyone should be using anyway.
What drives that suggestion?
I prefer DNS over HTTPS as some networks intercept DNS traffic, fail to parse the TLS-wrapped DNS payloads, and fail. DoH exists because DoTLS is prone to more interference.