Sonic Origins Plus is an enhanced version of the classic Sonic the Hedgehog games, including Sonic the Hedgehog, Sonic the Hedgehog 2, Sonic the Hedgehog CD, and Sonic the Hedgehog 3 & Knuckles. It features updated graphics, new features, and all the original gameplay.
Although ROMs might seem like an attractive option, there are compelling reasons to play Sonic Origins Plus on Switch through official channels: sonic origins plus switch rom
Since you are asking about the "Switch ROM," I will cover the technical performance of the game on the Switch hardware (which affects how well it runs on real hardware or emulators like Yuzu/Ryujinx), the content included, and the pros and cons of this specific version compared to other platforms. What is Sonic Origins Plus