How to create custom sidebar

Can you please suggest the way to create custom sidebar with controls like buttons, dropdowns , Labels etc.
I looked into Clock sidebar but that didnt help me much.
It will be really helpful if someone can suggest a way to add controls into it rather than a canvas kind of panel

You can create custom Toolbars and pin them to the side.

Here is an article on the toolbar creation.(pt_br)

https://www.schiavinatto.com/mundolibre/barra-de-ferramentas-personalizada_lm21.html