Purely in the phone division, they are not that innovative. But they have their fingers in a lot of pies, and are still #2 in semiconductors, they innovate a lot in display technology, they have their own processors, Samsung Pay was pretty huge and still has a serious impact, they are one of the big lithium ion battery companies, the S-Pen also was really huge for mobile devices in general, their foldable screens have a lot of potential.

Another really big thing is that Samsung funds a lot of basic research also at the university level, which AFAIK none of the big tech companies do.