Yandex has its own algorithm for generating one-time passwords. The link format looks something like this
otpauth://totp/test:me?secret=3XCGNQJBC3*******************AAKUYYHJNKXY%3D%3D%3D%3D%3D%3D&algorithm=SHA256&encoder=yandex&digits=8&period=30
Here is a working plugin for KeePass GitHub - norblik/KeeYaOtp: A Keepass plugin that generate one-time passwords for Yandex 2FA