Fix WordPress MySQL Error

I need assistance resolving a WordPress error on my IIS server: "Your PHP installation appears to be missing the MySQL extension which is required by WordPress."

Requirements:
- Install and enable the mysqli PHP extension
- Ensure compatibility with PHP 8.x
- Resolve this issue remotely and as soon as possible

Ideal Skills:
- Experience with PHP and WordPress
- Familiarity with IIS server
- Able to work quickly

Please only bid if you can start immediately and complete the job ASAP and it is remote work.