How can I directly access apps with single hot-keys? How can I directly access apps with single hot-keys?

Possible solutions which I don't get to work:

(1) Having often used applications constantly kept in the dock, it would be useful to have hotkeys like Apple-1, Apple-2, Apple-3, etc to access the first, second or third icon in the dock.  I am aware of Crtl-F3, but it requires left and rights to get to the wanted icon.

(2) I tried to define 'workflows' that launch apps and assign the corresponding services hotkeys, but that didn't work in all applications.

I know Apple-Tab.  However, depending on the other opened programs the keys to press to get to a specific application is always different.

Any solutions?
There is Free app in the App Store, so far so good:

https://apps.apple.com/us/app/hotkey-app/id975890633?mt=12

It even has a super convenient Toggle visibility of application option