Do you use content filtering / ad blocking technology in conjunction with Safari? Last I tried to use Safari, it seemed some of the most common tools could not be plugged in / added on to the browser.
I'm using AdGuard, on both desktop and mobile. It works well enough for my needs.
Another 2 handy extensions: Tabs to Links and Tab Spaces.
I don't have any affiliation with any of these extensions; just a satisfied user.