How to upgrade R for mac intel to mac silicon

I have moved from an older macBook to a mac M2; R and RStudio work well (under Rosetta). How would I upgrade to R for mac silicon.
Would I need to uninstall R and RStudio and then instal R followed by RStudio?
Would that entail re-installation of packages?
Some of my scripts use C/C++ code.
Should I even do that?

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