Add image/icon on NAVIGATION BAR

[Rollo55]

Example.... how can I add a 'Donate' icon/image (example before the 'donate icon' on my navigation bar?

https://i.postimg.cc/SNmYqHtX/icon.png


Example:

https://i.ytimg.com/vi/byIiP9VMtxM/hqdefault.jpg

https://prnt.sc/kzu6J2pWmQu5