Related:
webgisdr authentication - Esri Community
ArcGIS Web Adaptor 2FA - Esri Community
As of now, there is no official workflow for this aside from disabling MFA for the account used with WebGISDR.
Therefore I´ve created this idea: WebGISDR authentication options - Esri Community
Thanks for replying with this! Glad to know it will hopefully be addressed with a webgisdr update.
The next release is supposed to come with a new API based interface for WebgisDR, giving us the option to schedule and automate using default authentication.