Sort of, there are still laws against it in almost every state.

https://apnews.com/article/803cf0e75e924afbbbe9c77f15517da5

Wow, it is infuriating that people are still getting harassed for that. However, the fact that it is constitutionally protected basically precludes any of those charges from being pursued. Apparently, sometimes flag burners are harassed with other petty crimes like theft/littering.

Those aren't enforceable, and haven't been for decades.