1. Create new snippet 'language-country-flag' and paste below code:
<style>
.header-lang-switcher summary {
display: flex;
align-items: center;
}
</style>
<localization-form>
{%- form 'localization', id: 'FooterCountryForm', class: 'localization-form header-lang-switcher' -%}
<div class="no-js-hidden localization-form">
<details aria-haspopup="true" role="buton">
<summary tabindex="0">
{% if localization.country.iso_code == 'IL' %}
<img src="{{ 'il.svg' | asset_url }}" alt="country flag" width="20" height=""/>
{% else %}
<img src="{{ 'us.svg' | asset_url }}" alt="country flag" width="20" height=""/>
{% endif %}
{%- render 'component-icon', icon: 'expand_more' %}
</summary>
<ul role="list">
{%- for country in localization.available_countries -%}
{% if country.iso_code == 'IL' or country.iso_code == 'US' %}
<li tabindex="-1">
<a
class="{% if country.iso_code == localization.country.iso_code %} active{% endif %}"
href="#"
{% if country.iso_code == localization.country.iso_code %}
aria-current="true"
{% endif %}
data-value="{{ country.iso_code }}"
>
{% if country.iso_code == 'IL' %}
<img src="{{ 'il.svg' | asset_url }}" alt="country flag" width="20" height=""/>
{% else %}
<img src="{{ 'us.svg' | asset_url }}" alt="country flag" width="20" height=""/>
{% endif %}
</a>
</li>
{% endif %}
{%- endfor -%}
</ul>
</details>
<input
type="hidden"
name="country_code"
value="{{ localization.language.iso_code }}"
>
</div>
{%- endform -%}
</localization-form>
2. Upload country flags svg images in Assets.
3. Go to navigation-main.liquid and paste the render statement just right side of the cart icon code.
{% render 'language-country-flag' %}