Error Bar Plot for R2 Confidence Intervals

FJCC has given you an example using made up sample data, since you haven't provided any, so you just have to replace the name of the sample dataframe i.e. DF in the code by your actual dataframe and modify the code a little bit to use your actual variable names.
If you want more specific help please provide a minimal REPRoducible EXample (reprex) illustrating your issue.