Multi select check box drop down list with search list item facility in angular 11

Question

I want to develop a multi select check box drop down list with search facility in angular 11.

I tried following link https://www.c-sharpcorner.com/article/multi-select-dropdown-in-angular/

But this supports for angular version 14. I want to develop the same feature as in above link. Any help would be appreciated. Thank you.