Cant clear safari history

Are you running any anti - virus programs? Using a VPN?

Try setting up another admin user account in System Preferences/Users & Groups to see if the same problem continues. Please post back on whether or not this worked. Also try the Safe Mode. Please post back on whether or not this worked.

Isolating an issue by using another user account https://support.apple.com/en-us/HT204443

Safe Mode - About. https://support.apple.com/en-us/HT201262

If it works in the Safe Mode, try running this program when booted normally and then copy and paste the output in a reply. The program was created by Etresoft, a frequent contributor. Please use copy and paste as screen shots can be hard to read. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown. If the log won’t post, try posting it in Pastebin and provide a link in a reply. After pasting the report in a PasteBin page, go to the top of the page, and copy the address in the URL bar. Paste that in a new reply. Pastebin. https://pastebin.com/

Etrecheck – System Information. https://apps.apple.com/app/etrecheck/id1423715984?ls=1&mt=12

Web site version if required. https://etrecheck.com

iOS, iPadOS or macOS?

Private browsing will not save history.

Visit sites without making history

Tap , then tap Private.

While Private Browsing Mode is on, the Safari background is black instead of white, and sites you visit don’t appear in History on iPhone or in the list of tabs on your other devices.

https://support.apple.com/guide/iphone/browse-the-web-privately-iphb01fc3c85/ios

https://support.apple.com/guide/safari/browse-in-private-ibrw1069/mac

You are welcome. If transferring data from the original account to the new account caused the problem to come back, there is something in your original account that is causing the problem.