Perhaps you'd be interested in TUSD on SCRT[0] (or any bridged stablecoin) that can be wrapped in SNIP-20[1]. As far as I know this is as private as you'll get when it comes to a stablecoin.

Partisia[2] (currently in beta) and Tari[3] could provide something similar.

[0] https://scrt.network/blog/secret-network-ecosystem-update-ja...

[1] https://github.com/SecretFoundation/SNIPs/blob/master/SNIP-2...

[2] https://partisiablockchain.com/#/

[3] https://www.tari.com/