Perhaps this could instead be a discussion topic, but Lens and the presentation toolbar (Dashboard, Canvas) are using the same toolbar button styles which smells like a possible EUI addition (e.g. new button group variation?).

They've been operating with separate sets of styles and, as of this writing, are having to make simultaneous adjustments due to the Amsterdam switch in order to gain more contrast with the underlying background color.

The latest design proposal is here (adding a border):