Make the external openid MFA text consistent with desktop client

[gstorme]

Hi,

With external OpenID/MFA configured using provider Okta, the "Authenticate with" text/button is different in the desktop and mobile client.
Can the mobile client also display the configured provider name, similar to the desktop client?
This name will be more known to the enduser than "OpenID".

Screenshots of desktop & mobile client:

[kchudy]

@filipslezaklab Please verify if the mobile app uses the same endpoint as the desktop app. If so, it should be an easy one.