How do I clear old Safari Tabs from other devices?

That did the trick. Just some additional info for you. Turing the sync off on the iPhone was key and the driver. At that point I had the choice to erase all previously synced content or keep it on the iPhone. Obviously, erase was the needed selection for this.

Both have been turned back on and the tabs are still gone.

Thanks again!

Welp, it was too soon to celebrate. I don’t know when they came back exactly but the same websites are back. I have not visited them on my computer or any other device since they temporarily went aware after completing your suggestion.

Any other ideas for how to premaritally remove them?

I have not. I will try that now and mark your reply as solved if it works. Thank you.