How do I change the "Show Application" logo with an icon? [duplicate]

Workaround by Trail and Error

OS: Ubuntu 19.10
Shell Theme: Yaru

Additional Requirement: User-Themes Gnome Shell Extension.
(gnome-tweaks is also required if gsettings command line dont work for user-theme)

Create a local theme named MyTheme (or any other) ~/.local/share/themes/MyTheme/gnome-shell/gnome-shell.css with below content. (create the files if they dont exist)

@import url("/usr/share/gnome-shell/theme/Yaru/gnome-shell.css");


.show-apps .show-apps-icon {
border: none;
background-image: url("file:///home/maduri/1.svg");
background-size: contain;
color: transparent; }

.show-apps:hover .show-apps-icon, .show-apps:active .show-apps-icon, .show-apps:checked .show-apps-icon, .show-apps:focus .show-apps-icon {
color: transparent; 
background-image: url("file:///home/maduri/1.svg"); }

change the image path in above content.

Select the "MyTheme" user theme from command line or via gnome-tweaks.

refresh the shell with Alt+F2 r Enter.