If you have outputted the corresponding dataset then you could use SGPLOT with three SERIES statements to obtain the Hazard Ratio vs Covariate and the 95% confidence limits.
You could also plot the reference line using the REFLINE statment.
Have you also checked to see if you can get a plot similar to the one you want directly from using the PROC PHREG procedure?
SAS Innovate 2025: Register Now
Registration is now open for SAS Innovate 2025 , our biggest and most exciting global event of the year! Join us in Orlando, FL, May 6-9. Sign up by Dec. 31 to get the 2024 rate of just $495. Register now!
How to Concatenate Values
Learn how use the CAT functions in SAS to join values from multiple variables into a single value.