Ability for OIDC users to set legacy password

So I have MAS set up with my Synapse server and it works great. However, I have came across a problem where users who signed up with OIDC cannot log into clients that only support the legacy username/password auth (such as Thunderbird) since they didn't set any password through MAS in the first place.

I have tried setting a password by logging out and attempting a reset, but this does not appear to be possible with OIDC accounts.

So, it seems like it would be really useful to add the ability for users who created their account through OIDC to set a password that they can use on legacy clients.