Missing histogram in levels effect. (MAC)

Hello!

Recently ive been using the premier pro beta to do some advanced color editing and i belive ive encountered a bug in regard to the Levels effect on the new V25.1 update. On Windows there is a button directly to the right of the effect that allows you to open the histogram and adjust the levels that way, however on mac that option is missing. I use that feature quite heavily on the windows version and im confused how to get this working again, as its crucial to my coloring process for added effects. Would love to know if there is a possible resolution so i can edit using my mac.