Can I set up a TV, such as a a Samsung UN32H5500AFXZA LED Smart TV with software version 2240, which is what I have that was previously configured in Smart Hub, in SmartThings?

I don’t see any UN32 models listed in the supported TVs list. Not sure how old your TV is, but ST discontinued support for many models in the last couple of years. You can certainly try adding it from the mobile app and see if your TV can be discovered.

There is a community developed Edge driver that allows Roku streaming devices and TVs to be used with ST. More information here:

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