I was hacked

Any plugins that start with “salient” are likely part of the commercial Salient theme you’re using. You can only get these plugins and the theme from the developer here: https://themeforest.net/item/salient-responsive-multipurpose-theme/4363266

The “uninstall” plugin is extremely outdated, and you shouldn’t even consider using it. The same applies to “woo-show-empty-categories”, “breadcrumb-simple”, and “wp-defender”. I can’t find a plugin called “usps-woocommerce-shipping,” “woocommerce-colororimage-variation-select,” or “wpmudev-updates” anywhere.

Overall, I would recommend that you don’t try to rebuild the website exactly as it was, but rather rethink it. Take this opportunity to build something modern – not something based on such outdated software. Because if you do that, it will likely get hacked again very quickly.

The software you’re using isn’t just outdated. It hasn’t been supported for many years. There are no updates available for it.

If you want to get back online quickly and this is a shop, I would actually recommend building a completely new website. You can get that done quickly:

Install a fresh copy of WordPress.
Then install the Storefront theme: https://wordpress.org/themes/storefront/
And the WooCommerce plugin.

You’ll need to configure WooCommerce according to your requirements and, of course, add your products to it.

Depending on what the latter looks like for you, this can actually be done in a few hours. You could do this yourself without further support and at no additional cost.

Again: avoid using outdated software for which there are no updates anyway.

Alternatively, you can of course find someone to recreate your old project and adapt and fix the outdated software for you. You’ll surely find someone like that here: https://jobs.wordpress.net – but it will certainly cost something – including time.

As mentioned above, the Salient theme and its associated plugins are commercial products. We can’t provide any guidance on that here in the forum. Generally speaking, however, I would say you don’t need them if you’re no longer using Salient. Unfortunately, I can’t say whether you’ll lose any features that are essential for your shop, since I’m not familiar with these plugins for the reasons mentioned above. If you have any questions about this, please contact Salient’s support team.

Which theme are you referring to? Pending updates are generally listed under “Updates” or “Appearance”.

There are a number of security plugins to choose from: https://wordpress.org/plugins/tags/security/

However, these alone are not enough. You should also make sure to install updates regularly and, if necessary, check that your hosting environment is up to date (PHP version, etc.). See also: https://developer.wordpress.org/advanced-administration/security/hardening/