@Nidhi Priya Thanks for posting in our Q&A.
1.Please check the setting "Block All Cookies" and "Prevent Cross-Site Tracking" in Settings > Safari.
2.Not sure where this setting locates. Based on my research, Siri can’t access content from sources that allow user-generated content, such as Wikipedia.
https://support.apple.com/en-gb/guide/deployment/dep0f7dd3d8/web
It is suggested to contact Apple support to confirm such setting.
https://support.apple.com/
Thanks for your understanding.
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.