R is actually the abbreviation of "Registered" in English, which means registered trademark when used on a trademark, that is, this trademark is a registered trademark.

TM is the abbreviation of "Trade Mark" in English, which is used for trademarks that have submitted applications but the registration results have not yet come down.

in other words, r refers to a registered trademark, while TM refers to a trademark that has been applied for but has not been audited.