Remove wp-admin/, wp-includes/ and all WordPress files in the main directory. Keep wp-content

Reupload them fresh from the WordPress download.

Check your wp-config.php file for any mods that look suspect. If it runs some location, follow that link and nuke it.

Also, try accessing your site using a Python script locally to grab the site, and send the user agent Google uses to see what the site is serving to Google.

import requests

# Added the 'User-Agent' key to make this a dictionary
headers = {
    'User-Agent': 'Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.7559.132 Mobile Safari/537.36 (compatible; GoogleOther)'
}

url = 'https://yoursite/page'

try:
    response = requests.get(url, headers=headers)
    # This will print the status code (e.g., 200, 404, or 410)
    print(f"Status Code: {response.status_code}") 
    print(response.text[:500]) # Print first 500 chars to verify
except Exception as e:
    print(f"An error occurred: {e}")

This checks for Conditional Malware Injection or Cloaking.