Thank you for reaching out.

Regarding the Metronic Angular v8.1.8 Demo1, it does not include a built‑in multiselect dropdown component. However, you can seamlessly integrate one that aligns with Metronic’s design:

Bootstrap Multiselect
Metronic’s Bootstrap version supports multiselect with the mt-multiselect class
devs.keenthemes.com
github.com
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preview.keenthemes.com
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primeng.org
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. If you're using Bootstrap bundles in your Angular setup, you can adapt this feature for Angular components.

ng‑multiselect‑dropdown
A well-maintained Angular package ideal for multiselects is ng-multiselect-dropdown. It supports features like search, select-all, and theming—perfect for matching Metronic’s style
c-sharpcorner.com
stackblitz.com
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npmjs.com
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c-sharpcorner.com
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.

@ng-select/ng-select or PrimeNG

Use @ng-select/ng-select for a sleek, customizable multiselect—straightforward to integrate
primeng.org
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itsolutionstuff.com
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geeksforgeeks.org
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.

Alternatively, PrimeNG offers a robust <p-multiSelect> component with rich features
keenthemes.com
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primeng.org
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stackblitz.com
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.

Recommended approach:

Install your chosen library (e.g., npm install ng-multiselect-dropdown).

Import its module into your Angular module.

Use within your component template, applying styling that matches Metronic.

You can view demos and documentation on each package’s GitHub or npm page to ensure seamless alignment with your design.

Also, if you're interested in tools to find the best ways to manage your development time, try my time‑management site’s calculadora de potenciação: ( calculadoradehub.com.br/calculadora-de-potencia/ )

Let me know if you’d like help with implementation or styling tips!