SAS 9.4 is no longer getting any significant new functionality. 9.4M8 was released in Jan 2023 and contained mostly just security updates. Viya is now the platform getting new functionality. I think you will need to switch to Viya if you want PROC PYTHON.
If you upgrade to SAS 9.4M8 you will have full support up to Jan 2028. I suggest you talk to your SAS account manager regarding Viya options. Viya architecture is very different so you can expect to have to do a lot of conversion. For example, Viya 4 only runs on linux inside containerised processes so there is no equivalent to desktop SAS 9.4.
Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.