This task isn't about notifying users about new/updated/soon to be released beta features, or? (like proposed in https://www.mediawiki.org/wiki/Beta_Features/New_Feature_Popup_Guider)

Title sounds more like new regular features got in by deployment, but I can't bring it together with the banner text in the image. @Jaredzimmerman-WMF could you clarify this and extend the description, please?

Just as a note the fundraising banner infrastructure is CentralNotice https://www.mediawiki.org/wiki/Extension:CentralNotice controlled from Meta.

@Se4598 similar but different, this could certainly be used for BetaFeatures, but the linked work is specific to logged in users and Beta features, this task is more general, to all users, including logged out, and not necessarily related to Beta Features.