In order to enable this, go to Theme Settings → Header → Header type and choose Two Rows - Centered logo

Examples:

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/cd35c788-1a2c-4bb5-8dda-56657df572ec/Screen_Shot_2021-05-28_at_08.30.10.png

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/0e0a7a72-7551-456b-95c9-2cd3b16142fb/Screen_Shot_2021-05-28_at_08.31.26.png

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/1eafe466-eff1-4550-b711-fae8866e5a00/Screen_Shot_2021-05-28_at_08.33.36.png

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/16bd386b-2589-47d7-b73b-ad8c966c6b33/Screen_Shot_2021-05-28_at_08.34.27.png