Hi,
If you are unable to access the settings in Chrome, you might be logged in with a work or school account.
First, try opening Chrome and accessing chrome://settings/content/notifications by copying and pasting it into your address bar and pressing Enter.
Check if any sites are listed under pop-ups and remove the sites that have this permission.
If that doesn't work, go to chrome://settings/privacy > "Clear browsing data" > "All time," select the "Site settings" option, clear the data, then close and reopen Chrome.
I also recommend using the free AdwCleaner tool to check for any malicious extensions.
Additionally, check your extensions in Chrome by clicking the ... menu > Extensions > Manage extensions, then disable all extensions or remove any you don't recognize.
Please consider rating the question (accepting the answer or not) and visiting the Microsoft Q&A community if you have further questions.
Thanks.