MMDeveloper

Easy to use plugin, that blocks access to your wp-admin area by country. Uses geoip-api-php as the library to work out the visitor’s country.

Admin Block Country

It would be great to be able to redirect to a page 404

Good choice

Block access to your admin pages by country.

WP Wham

Product Visibility by Country for WooCommerce plugin lets you show/hide WooCommerce products depending on customer’s country. Customer’s country is detected automatically by IP.
There are options in plugin to hide products by:
<ul>
<li>Hiding catalog visibility – will hide selected products in shop and search results. However product still will be accessible via direct link.</li>
<li>Making products non-purchasable – will make selected products non-purchasable (i.e. product can’t be added to the cart).</li>
<li>Modifying products query – will hide selected products completely (including direct link).</li>
<li>Hiding products prices – will hide prices for selected products (i.e. will make products non-purchasable). Also you can optionally replace price with your own custom message.</li>
<li>Outputting customizable “product is not available in your country” message on single product and/or archives pages.</li>
<li>Hiding in WooCommerce Blocks – will hide selected products in blocks created with “WooCommerce Blocks” plugin.</li>
</ul>
<h4>Premium Version</h4>
<a href="https://wpwham.com/products/product-visibility-by-country-for-woocommerce/" rel="nofollow ugc">Pro version</a> has the options to:
<ul>
<li>Hide product terms (i.e. product categories and tags) by country.</li>
<li>Customize redirect URL for hidden products (i.e. set it different from 404 page).</li>
</ul>
<h4>Feedback</h4>
<ul>
<li>We are open to your suggestions and feedback. Thank you for using or trying out one of our plugins!</li>
<li><a href="https://wpwham.com/products/product-visibility-by-country-for-woocommerce/" rel="nofollow ugc">Visit plugin site</a>.</li>
</ul>

Product Visibility by Country for WooCommerce

Display WooCommerce products by customer's country.

Admin Block Country vs Product Visibility by Country for WooCommerce