How do you control the Jabra Elite Active 75t?

The Jabra Sound+ app requires demographic information to create a custom
sound profile.
On May 29, 2020, the Sound+ app (version 4.3) rolled out a firmware update to the Jabra Elite 75t and Jabra Elite Active 75t that enabled MySound and MyControls. The optimizes the sound signature based on an integrated hearing test, and the latter enables users to remap the multifunction controls. Set controls will not work in mono mode, however; though, Jabra is working on that with a future update.
https://www.soundguys.com/